diff --git a/core/data/src/commonMain/kotlin/zed/rainxch/core/data/repository/TweaksRepositoryImpl.kt b/core/data/src/commonMain/kotlin/zed/rainxch/core/data/repository/TweaksRepositoryImpl.kt
index 6331b2d9c..706fbaf1b 100644
--- a/core/data/src/commonMain/kotlin/zed/rainxch/core/data/repository/TweaksRepositoryImpl.kt
+++ b/core/data/src/commonMain/kotlin/zed/rainxch/core/data/repository/TweaksRepositoryImpl.kt
@@ -352,6 +352,17 @@ class TweaksRepositoryImpl(
         }
     }
 
+    override fun getShowAllPlatforms(): Flow<Boolean> =
+        preferences.data.map { prefs ->
+            prefs[SHOW_ALL_PLATFORMS_KEY] ?: false
+        }
+
+    override suspend fun setShowAllPlatforms(enabled: Boolean) {
+        preferences.edit { prefs ->
+            prefs[SHOW_ALL_PLATFORMS_KEY] = enabled
+        }
+    }
+
     override fun getBatteryOptimizationPromptDismissed(): Flow<Boolean> =
         preferences.data.map { prefs ->
             prefs[BATTERY_OPT_PROMPT_DISMISSED_KEY] ?: false
@@ -457,6 +468,7 @@ class TweaksRepositoryImpl(
         private val EXTERNAL_IMPORT_BANNER_DISMISSED_AT_KEY = intPreferencesKey("external_import_banner_dismissed_at")
         private val APK_INSPECT_COACHMARK_SHOWN_KEY = booleanPreferencesKey("apk_inspect_coachmark_shown")
         private val CHANNEL_CHIP_COACHMARK_SHOWN_KEY = booleanPreferencesKey("channel_chip_coachmark_shown")
+        private val SHOW_ALL_PLATFORMS_KEY = booleanPreferencesKey("show_all_platforms")
         private val BATTERY_OPT_PROMPT_DISMISSED_KEY = booleanPreferencesKey("battery_opt_prompt_dismissed")
         private val LAST_SEEN_WHATS_NEW_VERSION_CODE_KEY = intPreferencesKey("last_seen_whats_new_version_code")
         private val ANNOUNCEMENTS_DISMISSED_IDS_KEY = stringSetPreferencesKey("announcements_dismissed_ids")
diff --git a/core/domain/src/commonMain/kotlin/zed/rainxch/core/domain/repository/TweaksRepository.kt b/core/domain/src/commonMain/kotlin/zed/rainxch/core/domain/repository/TweaksRepository.kt
index 2051e6075..c8755e286 100644
--- a/core/domain/src/commonMain/kotlin/zed/rainxch/core/domain/repository/TweaksRepository.kt
+++ b/core/domain/src/commonMain/kotlin/zed/rainxch/core/domain/repository/TweaksRepository.kt
@@ -123,6 +123,15 @@ interface TweaksRepository {
 
     suspend fun setChannelChipCoachmarkShown(shown: Boolean)
 
+    /**
+     * When true, the release-assets picker on Details shows installers
+     * for every OS (grouped by platform section). When false (default),
+     * only assets installable on the current platform are listed.
+     */
+    fun getShowAllPlatforms(): Flow<Boolean>
+
+    suspend fun setShowAllPlatforms(enabled: Boolean)
+
     /**
      * One-shot watermark for the battery-optimization prompt on
      * aggressive-OEM ROMs (Oppo / OnePlus / Realme / Xiaomi / vivo /
diff --git a/core/domain/src/commonMain/kotlin/zed/rainxch/core/domain/util/AssetPlatform.kt b/core/domain/src/commonMain/kotlin/zed/rainxch/core/domain/util/AssetPlatform.kt
new file mode 100644
index 000000000..7c766d1a0
--- /dev/null
+++ b/core/domain/src/commonMain/kotlin/zed/rainxch/core/domain/util/AssetPlatform.kt
@@ -0,0 +1,26 @@
+package zed.rainxch.core.domain.util
+
+import zed.rainxch.core.domain.model.DiscoveryPlatform
+
+/**
+ * Maps a release asset filename to the OS platform it targets, by
+ * extension. Returns `null` for files we can't classify (zip bundles,
+ * sources, sig/sha files, etc.) — callers should drop those from the
+ * cross-platform picker so the list isn't polluted by non-installable
+ * sidecars.
+ */
+fun assetPlatformOf(assetName: String): DiscoveryPlatform? {
+    val lower = assetName.lowercase()
+    return when {
+        lower.endsWith(".apk") -> DiscoveryPlatform.Android
+        lower.endsWith(".exe") || lower.endsWith(".msi") -> DiscoveryPlatform.Windows
+        lower.endsWith(".dmg") || lower.endsWith(".pkg") -> DiscoveryPlatform.Macos
+        lower.endsWith(".deb") ||
+            lower.endsWith(".rpm") ||
+            lower.endsWith(".appimage") ||
+            lower.endsWith(".pkg.tar.zst") ||
+            lower.endsWith(".snap") ||
+            lower.endsWith(".flatpakref") -> DiscoveryPlatform.Linux
+        else -> null
+    }
+}
diff --git a/core/presentation/src/commonMain/composeResources/files/whatsnew/17.json b/core/presentation/src/commonMain/composeResources/files/whatsnew/17.json
index 24d54daf0..8c41fd508 100644
--- a/core/presentation/src/commonMain/composeResources/files/whatsnew/17.json
+++ b/core/presentation/src/commonMain/composeResources/files/whatsnew/17.json
@@ -12,7 +12,8 @@
         "Silent install via root — Magisk, KernelSU, and APatch users can now install without Shizuku or Dhizuku.",
         "Search in Starred and Favourites — quickly filter long lists by repo name, owner, description, or language.",
         "Self-owned ✓ badge — when you're signed in, repos you own get a verified checkmark on Home and Search cards.",
-        "Hide repository — long-press any repo card on Home or Search to hide it from discovery. The repo stays in your library if you have it installed."
+        "Hide repository — long-press any repo card on Home or Search to hide it from discovery. The repo stays in your library if you have it installed.",
+        "Multi-OS release picker — toggle 'Show all platforms' on the asset picker to grab Android APKs from desktop or Linux .debs from your phone. Other-platform downloads open in your browser to save for transfer."
       ]
     },
     {
diff --git a/core/presentation/src/commonMain/composeResources/values-ar/strings-ar.xml b/core/presentation/src/commonMain/composeResources/values-ar/strings-ar.xml
index 55b12c82d..0782f19bf 100644
--- a/core/presentation/src/commonMain/composeResources/values-ar/strings-ar.xml
+++ b/core/presentation/src/commonMain/composeResources/values-ar/strings-ar.xml
@@ -1165,4 +1165,12 @@
     <string name="open_on_github">فتح في GitHub</string>
     <string name="mark_as_viewed">وضع علامة مشاهد</string>
     <string name="mark_as_unviewed">إلغاء علامة مشاهد</string>
+    <string name="show_all_platforms_label">إظهار جميع المنصات</string>
+    <string name="platform_section_android">Android</string>
+    <string name="platform_section_windows">Windows</string>
+    <string name="platform_section_macos">macOS</string>
+    <string name="platform_section_linux">Linux</string>
+    <string name="saved_for_transfer_hint">منصة أخرى — يفتح في المتصفح للحفظ والنقل</string>
+    <string name="section_chip_your_device">جهازك</string>
+    <string name="section_chip_for_transfer">للنقل</string>
 </resources>
diff --git a/core/presentation/src/commonMain/composeResources/values-bn/strings-bn.xml b/core/presentation/src/commonMain/composeResources/values-bn/strings-bn.xml
index 9a7bfc34b..328decaed 100644
--- a/core/presentation/src/commonMain/composeResources/values-bn/strings-bn.xml
+++ b/core/presentation/src/commonMain/composeResources/values-bn/strings-bn.xml
@@ -1141,4 +1141,12 @@
     <string name="open_on_github">GitHub-এ খুলুন</string>
     <string name="mark_as_viewed">দেখা হিসেবে চিহ্নিত করুন</string>
     <string name="mark_as_unviewed">অদেখা হিসেবে চিহ্নিত করুন</string>
+    <string name="show_all_platforms_label">সব প্ল্যাটফর্ম দেখান</string>
+    <string name="platform_section_android">Android</string>
+    <string name="platform_section_windows">Windows</string>
+    <string name="platform_section_macos">macOS</string>
+    <string name="platform_section_linux">Linux</string>
+    <string name="saved_for_transfer_hint">অন্য প্ল্যাটফর্ম — ট্রান্সফারের জন্য সংরক্ষণে ব্রাউজারে খুলবে</string>
+    <string name="section_chip_your_device">আপনার ডিভাইস</string>
+    <string name="section_chip_for_transfer">ট্রান্সফারের জন্য</string>
 </resources>
diff --git a/core/presentation/src/commonMain/composeResources/values-es/strings-es.xml b/core/presentation/src/commonMain/composeResources/values-es/strings-es.xml
index 43cfd3fdb..9a2323f6f 100644
--- a/core/presentation/src/commonMain/composeResources/values-es/strings-es.xml
+++ b/core/presentation/src/commonMain/composeResources/values-es/strings-es.xml
@@ -1113,4 +1113,12 @@
     <string name="open_on_github">Abrir en GitHub</string>
     <string name="mark_as_viewed">Marcar como visto</string>
     <string name="mark_as_unviewed">Marcar como no visto</string>
+    <string name="show_all_platforms_label">Mostrar todas las plataformas</string>
+    <string name="platform_section_android">Android</string>
+    <string name="platform_section_windows">Windows</string>
+    <string name="platform_section_macos">macOS</string>
+    <string name="platform_section_linux">Linux</string>
+    <string name="saved_for_transfer_hint">Otra plataforma — se abre en el navegador para guardar y transferir</string>
+    <string name="section_chip_your_device">Tu dispositivo</string>
+    <string name="section_chip_for_transfer">Para transferir</string>
 </resources>
diff --git a/core/presentation/src/commonMain/composeResources/values-fr/strings-fr.xml b/core/presentation/src/commonMain/composeResources/values-fr/strings-fr.xml
index 7d41f1c31..0a593d247 100644
--- a/core/presentation/src/commonMain/composeResources/values-fr/strings-fr.xml
+++ b/core/presentation/src/commonMain/composeResources/values-fr/strings-fr.xml
@@ -1114,4 +1114,12 @@
     <string name="open_on_github">Ouvrir sur GitHub</string>
     <string name="mark_as_viewed">Marquer comme vu</string>
     <string name="mark_as_unviewed">Marquer comme non vu</string>
+    <string name="show_all_platforms_label">Afficher toutes les plateformes</string>
+    <string name="platform_section_android">Android</string>
+    <string name="platform_section_windows">Windows</string>
+    <string name="platform_section_macos">macOS</string>
+    <string name="platform_section_linux">Linux</string>
+    <string name="saved_for_transfer_hint">Autre plateforme — s\'ouvre dans le navigateur pour enregistrement et transfert</string>
+    <string name="section_chip_your_device">Votre appareil</string>
+    <string name="section_chip_for_transfer">Pour transfert</string>
 </resources>
diff --git a/core/presentation/src/commonMain/composeResources/values-hi/strings-hi.xml b/core/presentation/src/commonMain/composeResources/values-hi/strings-hi.xml
index b84d84048..47ce9bf06 100644
--- a/core/presentation/src/commonMain/composeResources/values-hi/strings-hi.xml
+++ b/core/presentation/src/commonMain/composeResources/values-hi/strings-hi.xml
@@ -1152,4 +1152,12 @@
     <string name="open_on_github">GitHub पर खोलें</string>
     <string name="mark_as_viewed">देखा हुआ चिह्नित करें</string>
     <string name="mark_as_unviewed">अनदेखा चिह्नित करें</string>
+    <string name="show_all_platforms_label">सभी प्लेटफ़ॉर्म दिखाएं</string>
+    <string name="platform_section_android">Android</string>
+    <string name="platform_section_windows">Windows</string>
+    <string name="platform_section_macos">macOS</string>
+    <string name="platform_section_linux">Linux</string>
+    <string name="saved_for_transfer_hint">अन्य प्लेटफ़ॉर्म — ट्रांसफ़र के लिए सहेजने हेतु ब्राउज़र में खुलता है</string>
+    <string name="section_chip_your_device">आपका डिवाइस</string>
+    <string name="section_chip_for_transfer">ट्रांसफ़र के लिए</string>
 </resources>
diff --git a/core/presentation/src/commonMain/composeResources/values-it/strings-it.xml b/core/presentation/src/commonMain/composeResources/values-it/strings-it.xml
index 013cc6899..8e779f379 100644
--- a/core/presentation/src/commonMain/composeResources/values-it/strings-it.xml
+++ b/core/presentation/src/commonMain/composeResources/values-it/strings-it.xml
@@ -1153,4 +1153,12 @@
     <string name="open_on_github">Apri su GitHub</string>
     <string name="mark_as_viewed">Segna come visto</string>
     <string name="mark_as_unviewed">Segna come non visto</string>
+    <string name="show_all_platforms_label">Mostra tutte le piattaforme</string>
+    <string name="platform_section_android">Android</string>
+    <string name="platform_section_windows">Windows</string>
+    <string name="platform_section_macos">macOS</string>
+    <string name="platform_section_linux">Linux</string>
+    <string name="saved_for_transfer_hint">Altra piattaforma — si apre nel browser per salvare e trasferire</string>
+    <string name="section_chip_your_device">Il tuo dispositivo</string>
+    <string name="section_chip_for_transfer">Da trasferire</string>
 </resources>
diff --git a/core/presentation/src/commonMain/composeResources/values-ja/strings-ja.xml b/core/presentation/src/commonMain/composeResources/values-ja/strings-ja.xml
index 4b01ea662..c8888832d 100644
--- a/core/presentation/src/commonMain/composeResources/values-ja/strings-ja.xml
+++ b/core/presentation/src/commonMain/composeResources/values-ja/strings-ja.xml
@@ -1108,4 +1108,12 @@
     <string name="open_on_github">GitHub で開く</string>
     <string name="mark_as_viewed">既読にする</string>
     <string name="mark_as_unviewed">未読にする</string>
+    <string name="show_all_platforms_label">すべてのプラットフォームを表示</string>
+    <string name="platform_section_android">Android</string>
+    <string name="platform_section_windows">Windows</string>
+    <string name="platform_section_macos">macOS</string>
+    <string name="platform_section_linux">Linux</string>
+    <string name="saved_for_transfer_hint">他のプラットフォーム — ブラウザで開き、転送用に保存します</string>
+    <string name="section_chip_your_device">このデバイス</string>
+    <string name="section_chip_for_transfer">転送用</string>
 </resources>
diff --git a/core/presentation/src/commonMain/composeResources/values-ko/strings-ko.xml b/core/presentation/src/commonMain/composeResources/values-ko/strings-ko.xml
index 11a42a4e1..2bd8eb83d 100644
--- a/core/presentation/src/commonMain/composeResources/values-ko/strings-ko.xml
+++ b/core/presentation/src/commonMain/composeResources/values-ko/strings-ko.xml
@@ -1143,4 +1143,12 @@
     <string name="open_on_github">GitHub에서 열기</string>
     <string name="mark_as_viewed">본 항목으로 표시</string>
     <string name="mark_as_unviewed">본 항목 해제</string>
+    <string name="show_all_platforms_label">모든 플랫폼 표시</string>
+    <string name="platform_section_android">Android</string>
+    <string name="platform_section_windows">Windows</string>
+    <string name="platform_section_macos">macOS</string>
+    <string name="platform_section_linux">Linux</string>
+    <string name="saved_for_transfer_hint">다른 플랫폼 — 전송용 저장을 위해 브라우저에서 열립니다</string>
+    <string name="section_chip_your_device">내 기기</string>
+    <string name="section_chip_for_transfer">전송용</string>
 </resources>
diff --git a/core/presentation/src/commonMain/composeResources/values-pl/strings-pl.xml b/core/presentation/src/commonMain/composeResources/values-pl/strings-pl.xml
index 2fbfce06d..2b1c8ca68 100644
--- a/core/presentation/src/commonMain/composeResources/values-pl/strings-pl.xml
+++ b/core/presentation/src/commonMain/composeResources/values-pl/strings-pl.xml
@@ -1134,4 +1134,12 @@
     <string name="open_on_github">Otwórz w GitHub</string>
     <string name="mark_as_viewed">Oznacz jako obejrzane</string>
     <string name="mark_as_unviewed">Oznacz jako nieobejrzane</string>
+    <string name="show_all_platforms_label">Pokaż wszystkie platformy</string>
+    <string name="platform_section_android">Android</string>
+    <string name="platform_section_windows">Windows</string>
+    <string name="platform_section_macos">macOS</string>
+    <string name="platform_section_linux">Linux</string>
+    <string name="saved_for_transfer_hint">Inna platforma — otwiera się w przeglądarce, aby zapisać do transferu</string>
+    <string name="section_chip_your_device">Twoje urządzenie</string>
+    <string name="section_chip_for_transfer">Do transferu</string>
 </resources>
diff --git a/core/presentation/src/commonMain/composeResources/values-ru/strings-ru.xml b/core/presentation/src/commonMain/composeResources/values-ru/strings-ru.xml
index 825cbff54..6923c381c 100644
--- a/core/presentation/src/commonMain/composeResources/values-ru/strings-ru.xml
+++ b/core/presentation/src/commonMain/composeResources/values-ru/strings-ru.xml
@@ -1134,4 +1134,12 @@
     <string name="open_on_github">Открыть на GitHub</string>
     <string name="mark_as_viewed">Отметить как просмотренный</string>
     <string name="mark_as_unviewed">Снять отметку</string>
+    <string name="show_all_platforms_label">Показать все платформы</string>
+    <string name="platform_section_android">Android</string>
+    <string name="platform_section_windows">Windows</string>
+    <string name="platform_section_macos">macOS</string>
+    <string name="platform_section_linux">Linux</string>
+    <string name="saved_for_transfer_hint">Другая платформа — открывается в браузере для сохранения и переноса</string>
+    <string name="section_chip_your_device">Это устройство</string>
+    <string name="section_chip_for_transfer">Для переноса</string>
 </resources>
diff --git a/core/presentation/src/commonMain/composeResources/values-tr/strings-tr.xml b/core/presentation/src/commonMain/composeResources/values-tr/strings-tr.xml
index 1ed48e73c..02ac744dd 100644
--- a/core/presentation/src/commonMain/composeResources/values-tr/strings-tr.xml
+++ b/core/presentation/src/commonMain/composeResources/values-tr/strings-tr.xml
@@ -1150,4 +1150,12 @@
     <string name="open_on_github">GitHub\'da aç</string>
     <string name="mark_as_viewed">Görüldü olarak işaretle</string>
     <string name="mark_as_unviewed">Görülmedi olarak işaretle</string>
+    <string name="show_all_platforms_label">Tüm platformları göster</string>
+    <string name="platform_section_android">Android</string>
+    <string name="platform_section_windows">Windows</string>
+    <string name="platform_section_macos">macOS</string>
+    <string name="platform_section_linux">Linux</string>
+    <string name="saved_for_transfer_hint">Diğer platform — aktarma için kaydetmek üzere tarayıcıda açılır</string>
+    <string name="section_chip_your_device">Cihazınız</string>
+    <string name="section_chip_for_transfer">Aktarım için</string>
 </resources>
diff --git a/core/presentation/src/commonMain/composeResources/values-zh-rCN/strings-zh-rCN.xml b/core/presentation/src/commonMain/composeResources/values-zh-rCN/strings-zh-rCN.xml
index f6c082f1e..875e6e1c3 100644
--- a/core/presentation/src/commonMain/composeResources/values-zh-rCN/strings-zh-rCN.xml
+++ b/core/presentation/src/commonMain/composeResources/values-zh-rCN/strings-zh-rCN.xml
@@ -1110,4 +1110,12 @@
     <string name="open_on_github">在 GitHub 打开</string>
     <string name="mark_as_viewed">标记为已查看</string>
     <string name="mark_as_unviewed">取消已查看标记</string>
+    <string name="show_all_platforms_label">显示所有平台</string>
+    <string name="platform_section_android">Android</string>
+    <string name="platform_section_windows">Windows</string>
+    <string name="platform_section_macos">macOS</string>
+    <string name="platform_section_linux">Linux</string>
+    <string name="saved_for_transfer_hint">其他平台 — 在浏览器中打开以保存并转移</string>
+    <string name="section_chip_your_device">你的设备</string>
+    <string name="section_chip_for_transfer">用于转移</string>
 </resources>
diff --git a/core/presentation/src/commonMain/composeResources/values/strings.xml b/core/presentation/src/commonMain/composeResources/values/strings.xml
index 7b19efea3..1943cc855 100644
--- a/core/presentation/src/commonMain/composeResources/values/strings.xml
+++ b/core/presentation/src/commonMain/composeResources/values/strings.xml
@@ -775,6 +775,14 @@
     <string name="open_on_github">Open on GitHub</string>
     <string name="mark_as_viewed">Mark as viewed</string>
     <string name="mark_as_unviewed">Mark as unviewed</string>
+    <string name="show_all_platforms_label">Show all platforms</string>
+    <string name="platform_section_android">Android</string>
+    <string name="platform_section_windows">Windows</string>
+    <string name="platform_section_macos">macOS</string>
+    <string name="platform_section_linux">Linux</string>
+    <string name="saved_for_transfer_hint">Other platform — opens in browser to save for transfer</string>
+    <string name="section_chip_your_device">Your device</string>
+    <string name="section_chip_for_transfer">For transfer</string>
     <string name="repository_hidden">Repository hidden</string>
     <string name="undo_hide">Undo</string>
     <string name="hidden_repositories_title">Hidden repositories</string>
diff --git a/feature/details/presentation/src/commonMain/kotlin/zed/rainxch/details/presentation/DetailsAction.kt b/feature/details/presentation/src/commonMain/kotlin/zed/rainxch/details/presentation/DetailsAction.kt
index 2e419c5e8..d9057a784 100644
--- a/feature/details/presentation/src/commonMain/kotlin/zed/rainxch/details/presentation/DetailsAction.kt
+++ b/feature/details/presentation/src/commonMain/kotlin/zed/rainxch/details/presentation/DetailsAction.kt
@@ -159,4 +159,20 @@ sealed interface DetailsAction {
      * Persists so the coachmark only ever shows once.
      */
     data object OnAcknowledgeChannelChipCoachmark : DetailsAction
+
+    /**
+     * Flip the "Show all platforms" picker setting (persisted globally).
+     * Carries the explicit target value so rapid back-and-forth toggles
+     * don't race against a stale read of the in-memory state.
+     */
+    data class OnToggleShowAllPlatforms(val enabled: Boolean) : DetailsAction
+
+    /**
+     * Download a non-current-platform asset for transfer to another
+     * device. Routes to the user's browser so the file lands in their
+     * normal Downloads folder.
+     */
+    data class OnDownloadForTransfer(
+        val assetUrl: String,
+    ) : DetailsAction
 }
diff --git a/feature/details/presentation/src/commonMain/kotlin/zed/rainxch/details/presentation/DetailsState.kt b/feature/details/presentation/src/commonMain/kotlin/zed/rainxch/details/presentation/DetailsState.kt
index b0991ec24..108efa98f 100644
--- a/feature/details/presentation/src/commonMain/kotlin/zed/rainxch/details/presentation/DetailsState.kt
+++ b/feature/details/presentation/src/commonMain/kotlin/zed/rainxch/details/presentation/DetailsState.kt
@@ -134,6 +134,13 @@ data class DetailsState(
      * `ChannelChip` so users discover the per-app channel toggle.
      */
     val isChannelChipCoachmarkPending: Boolean = false,
+    /**
+     * Mirrors `TweaksRepository.getShowAllPlatforms()`. When true the
+     * release-assets picker lists installers for every OS (grouped by
+     * section); the install button still operates on the current
+     * platform's primary asset.
+     */
+    val showAllPlatforms: Boolean = false,
 ) {
     val filteredReleases: List<GithubRelease>
         get() =
diff --git a/feature/details/presentation/src/commonMain/kotlin/zed/rainxch/details/presentation/DetailsViewModel.kt b/feature/details/presentation/src/commonMain/kotlin/zed/rainxch/details/presentation/DetailsViewModel.kt
index 96b4e4e05..5591f23bd 100644
--- a/feature/details/presentation/src/commonMain/kotlin/zed/rainxch/details/presentation/DetailsViewModel.kt
+++ b/feature/details/presentation/src/commonMain/kotlin/zed/rainxch/details/presentation/DetailsViewModel.kt
@@ -147,6 +147,7 @@ class DetailsViewModel(
                     observeApkInspectCoachmark()
                     observeChannelChipCoachmark()
                     observeCurrentUserForBadge()
+                    observeShowAllPlatforms()
 
                     hasLoadedInitialData = true
                 }
@@ -492,6 +493,29 @@ class DetailsViewModel(
             DetailsAction.OnAcknowledgeChannelChipCoachmark -> {
                 acknowledgeChannelChipCoachmark()
             }
+
+            is DetailsAction.OnToggleShowAllPlatforms -> {
+                viewModelScope.launch {
+                    try {
+                        tweaksRepository.setShowAllPlatforms(action.enabled)
+                    } catch (e: CancellationException) {
+                        throw e
+                    } catch (e: Throwable) {
+                        logger.warn("Toggle show-all-platforms failed: ${e.message}")
+                    }
+                }
+            }
+
+            is DetailsAction.OnDownloadForTransfer -> {
+                // Cross-platform assets land here when the user picks an
+                // installer for a different OS. Browser handles the
+                // actual save-to-Downloads — keeps install plumbing
+                // unchanged and matches existing "open external link"
+                // flows on Details.
+                helper.openUrl(action.assetUrl) { err ->
+                    logger.warn("Open transfer download failed: $err")
+                }
+            }
         }
     }
 
@@ -873,6 +897,14 @@ class DetailsViewModel(
         }
     }
 
+    private fun observeShowAllPlatforms() {
+        viewModelScope.launch {
+            tweaksRepository.getShowAllPlatforms().collect { enabled ->
+                _state.update { it.copy(showAllPlatforms = enabled) }
+            }
+        }
+    }
+
     private fun observeChannelChipCoachmark() {
         viewModelScope.launch {
             val alreadyShown =
diff --git a/feature/details/presentation/src/commonMain/kotlin/zed/rainxch/details/presentation/components/ReleaseAssetsPicker.kt b/feature/details/presentation/src/commonMain/kotlin/zed/rainxch/details/presentation/components/ReleaseAssetsPicker.kt
index bd89694a8..962c57d34 100644
--- a/feature/details/presentation/src/commonMain/kotlin/zed/rainxch/details/presentation/components/ReleaseAssetsPicker.kt
+++ b/feature/details/presentation/src/commonMain/kotlin/zed/rainxch/details/presentation/components/ReleaseAssetsPicker.kt
@@ -18,7 +18,10 @@ import androidx.compose.foundation.lazy.items
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.CheckCircle
 import androidx.compose.material.icons.filled.UnfoldMore
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material.icons.outlined.Devices
 import androidx.compose.material.icons.outlined.Info
+import androidx.compose.material3.CardDefaults
 import androidx.compose.material3.AlertDialogDefaults
 import androidx.compose.material3.BasicAlertDialog
 import androidx.compose.material3.ExperimentalMaterial3Api
@@ -70,19 +73,35 @@ fun ReleaseAssetsPicker(
     selectedAsset: GithubAsset? = null,
     isPickerVisible: Boolean = false,
     pinnedVariant: String? = null,
+    showAllPlatforms: Boolean = false,
+    crossPlatformAssets: List<GithubAsset> = emptyList(),
 ) {
-    val isPickerEnabled by remember(assetsList) {
-        derivedStateOf { assetsList.isNotEmpty() }
+    // Decouple from `showAllPlatforms`: the toggle lives INSIDE the sheet,
+    // so disabling the open-card whenever the current branch is empty
+    // would lock the user out of flipping the setting back. Picker stays
+    // openable whenever either source has anything to show.
+    val isPickerEnabled by remember(assetsList, crossPlatformAssets) {
+        derivedStateOf {
+            assetsList.isNotEmpty() || crossPlatformAssets.isNotEmpty()
+        }
     }
 
     ReleaseAssetsItemsPicker(
         showPicker = isPickerVisible,
         assetsList = assetsList,
+        crossPlatformAssets = crossPlatformAssets,
+        showAllPlatforms = showAllPlatforms,
         selectedAsset = selectedAsset,
         pinnedVariant = pinnedVariant,
         onDismiss = { onAction(DetailsAction.ToggleReleaseAssetsPicker) },
         onSelect = { onAction(DetailsAction.SelectDownloadAsset(it)) },
         onUnpin = { onAction(DetailsAction.UnpinPreferredVariant) },
+        onToggleShowAllPlatforms = { enabled ->
+            onAction(DetailsAction.OnToggleShowAllPlatforms(enabled))
+        },
+        onDownloadForTransfer = { asset ->
+            onAction(DetailsAction.OnDownloadForTransfer(asset.downloadUrl))
+        },
     )
 
     Column(
@@ -127,16 +146,20 @@ fun ReleaseAssetsPicker(
     }
 }
 
-@OptIn(ExperimentalMaterial3Api::class)
+@OptIn(ExperimentalMaterial3Api::class, ExperimentalMaterial3ExpressiveApi::class)
 @Composable
 private fun ReleaseAssetsItemsPicker(
     assetsList: List<GithubAsset>,
+    crossPlatformAssets: List<GithubAsset>,
+    showAllPlatforms: Boolean,
     selectedAsset: GithubAsset?,
     pinnedVariant: String?,
     showPicker: Boolean,
     onDismiss: () -> Unit,
     onSelect: (GithubAsset) -> Unit,
     onUnpin: () -> Unit,
+    onToggleShowAllPlatforms: (Boolean) -> Unit,
+    onDownloadForTransfer: (GithubAsset) -> Unit,
     modifier: Modifier = Modifier,
 ) {
     if (!showPicker) return
@@ -199,13 +222,106 @@ private fun ReleaseAssetsItemsPicker(
                 }
             }
 
-            HorizontalDivider()
+            // Cross-platform toggle. Persisted globally — flipping here
+            // changes every Details screen's picker behaviour for this
+            // user. Off = current-OS assets only; On = grouped sections
+            // for Android / Windows / macOS / Linux.
+            Surface(
+                shape = RoundedCornerShape(20.dp),
+                color = MaterialTheme.colorScheme.surfaceContainerHigh,
+                modifier =
+                    Modifier
+                        .fillMaxWidth()
+                        .padding(horizontal = 16.dp, vertical = 8.dp),
+            ) {
+                Row(
+                    modifier =
+                        Modifier
+                            .clickable(onClick = { onToggleShowAllPlatforms(!showAllPlatforms) })
+                            .padding(horizontal = 16.dp, vertical = 10.dp),
+                    verticalAlignment = Alignment.CenterVertically,
+                ) {
+                    Icon(
+                        imageVector = Icons.Outlined.Devices,
+                        contentDescription = null,
+                        tint = MaterialTheme.colorScheme.onSurface,
+                    )
+                    Spacer(Modifier.size(12.dp))
+                    Text(
+                        text = stringResource(Res.string.show_all_platforms_label),
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = MaterialTheme.colorScheme.onSurface,
+                        modifier = Modifier.weight(1f),
+                    )
+                    androidx.compose.material3.Switch(
+                        checked = showAllPlatforms,
+                        onCheckedChange = onToggleShowAllPlatforms,
+                    )
+                }
+            }
 
+            // Hoisted out of the LazyListScope below: `LazyColumn { … }`
+                // body is not a @Composable context, so `remember` calls have
+                // to live in the enclosing Column instead.
+            val groups = remember(crossPlatformAssets) {
+                crossPlatformAssets
+                    .groupBy {
+                        zed.rainxch.core.domain.util.assetPlatformOf(it.name)
+                    }
+                    .filterKeys { it != null }
+                    .mapKeys { it.key!! }
+            }
+            val installableIds = remember(assetsList) {
+                assetsList.map { it.id }.toSet()
+            }
             LazyColumn(
                 modifier = Modifier.fillMaxWidth(),
-                contentPadding = PaddingValues(vertical = 8.dp),
+                contentPadding = PaddingValues(horizontal = 16.dp, vertical = 8.dp),
+                verticalArrangement = Arrangement.spacedBy(12.dp),
             ) {
-                if (assetsList.isNotEmpty()) {
+                // Grouped path only when the toggle is on AND the release
+                // has platform-classifiable assets. If toggle is on but
+                // `assetPlatformOf` rejected every asset (e.g. release
+                // ships only .zip bundles / extensionless binaries), we
+                // fall through to the OFF-mode `assetsList` render so
+                // the user still sees the current-platform installables
+                // instead of an empty sheet.
+                if (showAllPlatforms && groups.isNotEmpty()) {
+                    // Order: current-platform section first (it's the
+                    // primary install target), then the others.
+                    val sectionOrder =
+                        listOf(
+                            zed.rainxch.core.domain.model.DiscoveryPlatform.Android to Res.string.platform_section_android,
+                            zed.rainxch.core.domain.model.DiscoveryPlatform.Windows to Res.string.platform_section_windows,
+                            zed.rainxch.core.domain.model.DiscoveryPlatform.Macos to Res.string.platform_section_macos,
+                            zed.rainxch.core.domain.model.DiscoveryPlatform.Linux to Res.string.platform_section_linux,
+                        ).sortedByDescending { (platform, _) ->
+                            groups[platform]?.any { it.id in installableIds } == true
+                        }
+                    sectionOrder.forEach { (platform, labelRes) ->
+                        val assets = groups[platform].orEmpty()
+                        if (assets.isEmpty()) return@forEach
+                        val isCurrentDevice =
+                            assets.any { it.id in installableIds }
+                        item(key = "section-${platform.name}") {
+                            PlatformSectionCard(
+                                platformLabel = stringResource(labelRes),
+                                isCurrentDevice = isCurrentDevice,
+                                installableIds = installableIds,
+                                assets = assets,
+                                selectedAsset = selectedAsset,
+                                pinnedVariant = pinnedVariant,
+                                onAssetClick = { asset ->
+                                    if (asset.id in installableIds) {
+                                        onSelect(asset)
+                                    } else {
+                                        onDownloadForTransfer(asset)
+                                    }
+                                },
+                            )
+                        }
+                    }
+                } else if (assetsList.isNotEmpty()) {
                     items(items = assetsList, key = { it.id }) { asset ->
                         val variantTag = AssetVariant.extract(asset.name)
                         val isPinned =
@@ -366,3 +482,113 @@ private fun ReleaseAssetsPickerItemPreview() {
         isSelected = false,
     )
 }
+
+@OptIn(ExperimentalMaterial3ExpressiveApi::class)
+@Composable
+private fun PlatformSectionCard(
+    platformLabel: String,
+    isCurrentDevice: Boolean,
+    installableIds: Set<Long>,
+    assets: List<GithubAsset>,
+    selectedAsset: GithubAsset?,
+    pinnedVariant: String?,
+    onAssetClick: (GithubAsset) -> Unit,
+) {
+    OutlinedCard(
+        colors =
+            CardDefaults.outlinedCardColors(
+                containerColor =
+                    if (isCurrentDevice) {
+                        MaterialTheme.colorScheme.surfaceContainerLow
+                    } else {
+                        MaterialTheme.colorScheme.surfaceContainerLowest
+                    },
+            ),
+        shape = RoundedCornerShape(20.dp),
+        modifier = Modifier.fillMaxWidth(),
+    ) {
+        Row(
+            modifier =
+                Modifier
+                    .fillMaxWidth()
+                    .padding(horizontal = 16.dp, vertical = 10.dp),
+            verticalAlignment = Alignment.CenterVertically,
+            horizontalArrangement = Arrangement.spacedBy(8.dp),
+        ) {
+            Text(
+                text = platformLabel,
+                style = MaterialTheme.typography.titleSmall,
+                fontWeight = FontWeight.SemiBold,
+                color = MaterialTheme.colorScheme.onSurface,
+                modifier = Modifier.weight(1f),
+            )
+            SectionChip(
+                label =
+                    if (isCurrentDevice) {
+                        stringResource(Res.string.section_chip_your_device)
+                    } else {
+                        stringResource(Res.string.section_chip_for_transfer)
+                    },
+                isPrimary = isCurrentDevice,
+            )
+        }
+
+        HorizontalDivider(
+            color = MaterialTheme.colorScheme.outlineVariant,
+            modifier = Modifier.padding(horizontal = 12.dp),
+        )
+
+        assets.forEachIndexed { index, asset ->
+            val isInstallableHere = asset.id in installableIds
+            val variantTag = AssetVariant.extract(asset.name)
+            val isPinned =
+                isInstallableHere &&
+                    !pinnedVariant.isNullOrBlank() &&
+                    variantTag?.equals(pinnedVariant, ignoreCase = true) == true
+            ReleaseAssetItem(
+                asset = asset,
+                isSelected = isInstallableHere && asset.id == selectedAsset?.id,
+                isPinned = isPinned,
+                onClick = { onAssetClick(asset) },
+                modifier = Modifier.fillMaxWidth(),
+            )
+            if (index < assets.lastIndex) {
+                HorizontalDivider(
+                    color = MaterialTheme.colorScheme.outlineVariant.copy(alpha = 0.4f),
+                    modifier = Modifier.padding(horizontal = 16.dp),
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun SectionChip(
+    label: String,
+    isPrimary: Boolean,
+) {
+    val container =
+        if (isPrimary) {
+            MaterialTheme.colorScheme.primaryContainer
+        } else {
+            MaterialTheme.colorScheme.tertiaryContainer
+        }
+    val content =
+        if (isPrimary) {
+            MaterialTheme.colorScheme.onPrimaryContainer
+        } else {
+            MaterialTheme.colorScheme.onTertiaryContainer
+        }
+    Surface(
+        shape = RoundedCornerShape(8.dp),
+        color = container,
+    ) {
+        Text(
+            text = label,
+            style = MaterialTheme.typography.labelSmall,
+            fontWeight = FontWeight.SemiBold,
+            color = content,
+            modifier = Modifier.padding(horizontal = 8.dp, vertical = 3.dp),
+        )
+    }
+}
diff --git a/feature/details/presentation/src/commonMain/kotlin/zed/rainxch/details/presentation/components/sections/Header.kt b/feature/details/presentation/src/commonMain/kotlin/zed/rainxch/details/presentation/components/sections/Header.kt
index 3db733dff..d713ead67 100644
--- a/feature/details/presentation/src/commonMain/kotlin/zed/rainxch/details/presentation/components/sections/Header.kt
+++ b/feature/details/presentation/src/commonMain/kotlin/zed/rainxch/details/presentation/components/sections/Header.kt
@@ -107,11 +107,26 @@ fun LazyListScope.header(
                     horizontalArrangement = Arrangement.spacedBy(6.dp),
                     verticalAlignment = Alignment.CenterVertically,
                 ) {
+                    // Memoize the platform-classifiable subset of release
+                    // assets so each Header recompose (scroll, animation,
+                    // unrelated state change) doesn't re-run the filter.
+                    val crossPlatformAssets =
+                        androidx.compose.runtime.remember(state.selectedRelease) {
+                            state.selectedRelease
+                                ?.assets
+                                ?.filter {
+                                    zed.rainxch.core.domain.util
+                                        .assetPlatformOf(it.name) != null
+                                }
+                                .orEmpty()
+                        }
                     ReleaseAssetsPicker(
                         assetsList = state.installableAssets,
                         selectedAsset = state.primaryAsset,
                         isPickerVisible = state.isReleaseSelectorVisible,
                         pinnedVariant = state.installedApp?.preferredAssetVariant,
+                        showAllPlatforms = state.showAllPlatforms,
+                        crossPlatformAssets = crossPlatformAssets,
                         onAction = onAction,
                         modifier = Modifier.weight(.65f),
                     )