diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/favorites/FavoriteNostrAppPreloader.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/favorites/FavoriteNostrAppPreloader.kt
new file mode 100644
index 0000000000..f1aebc6ea7
--- /dev/null
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/favorites/FavoriteNostrAppPreloader.kt
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.favorites
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import com.vitorpamplona.amethyst.commons.favorites.FavoriteApp
+import com.vitorpamplona.amethyst.commons.relayClient.subscriptions.LifecycleAwareKeyDataSourceSubscription
+import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.service.relayClient.reqCommand.event.EventFinderQueryState
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+
+/**
+ * Pre-fetches the addressable events behind the user's favorited [FavoriteApp.NostrApp]s (nSites /
+ * nApplets) while a screen that can launch them is on screen.
+ *
+ * A favorite stores only the addressable coordinate `kind:pubkey:dtag`, never the event. The launch
+ * path ([FavoriteAppLauncher.launchNostrApp] / [FavoriteAppLauncher.embedParams]) re-resolves the live
+ * event from [LocalCache] at tap time, so a favorite whose event hasn't streamed in yet can't launch —
+ * the user gets the "isn't loaded yet" toast / unavailable tab. Before this preloader, the only thing
+ * that pulled those events into the cache was visiting the nsite/napplet feed (it subscribes by author),
+ * which is why opening that feed and coming back made a favorite suddenly launchable.
+ *
+ * This subscribes each favorited coordinate to the shared
+ * [EventFinder][com.vitorpamplona.amethyst.service.relayClient.reqCommand.event.EventFinderFilterAssembler]
+ * — the same lifecycle-aware loader [observeNote][com.vitorpamplona.amethyst.service.relayClient.reqCommand.event.observeNote]
+ * uses — so the manifests fetch (via the author's outbox relays) as soon as the launcher opens and are
+ * already in [LocalCache] by the time the user taps. The loader drops each coordinate from its filter
+ * once the event arrives, so this is a one-shot fetch, not a standing feed.
+ */
+@Composable
+fun PreloadFavoriteNostrApps(
+    apps: List<FavoriteApp>,
+    accountViewModel: AccountViewModel,
+) {
+    val account = accountViewModel.account
+    // Reuse the same query-state instances across recompositions (the manager ref-counts by identity),
+    // recomputing only when the favorite list or account changes. Events that already loaded are still
+    // included; the loader simply skips them because their note already has an event.
+    val states =
+        remember(apps, account) {
+            apps
+                .filterIsInstance<FavoriteApp.NostrApp>()
+                .mapNotNull { LocalCache.checkGetOrCreateAddressableNote(it.coordinate) }
+                .map { EventFinderQueryState(it, account) }
+        }
+
+    LifecycleAwareKeyDataSourceSubscription(states, accountViewModel.dataSources().eventFinder)
+}
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/browser/BrowserScreen.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/browser/BrowserScreen.kt
index 7bc5bf365a..060d5a4be1 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/browser/BrowserScreen.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/browser/BrowserScreen.kt
@@ -82,6 +82,7 @@ import com.vitorpamplona.amethyst.favorites.BrowserHistoryRegistry
 import com.vitorpamplona.amethyst.favorites.BrowserIconRegistry
 import com.vitorpamplona.amethyst.favorites.FavoriteAppLauncher
 import com.vitorpamplona.amethyst.favorites.FavoriteAppsRegistry
+import com.vitorpamplona.amethyst.favorites.PreloadFavoriteNostrApps
 import com.vitorpamplona.amethyst.ui.navigation.bottombars.AppBottomBar
 import com.vitorpamplona.amethyst.ui.navigation.navs.INav
 import com.vitorpamplona.amethyst.ui.navigation.routes.Route
@@ -125,6 +126,10 @@ private fun BrowserLauncher(
     val history by BrowserHistoryRegistry.history.collectAsStateWithLifecycle()
     val iconKeys by BrowserIconRegistry.keys.collectAsStateWithLifecycle()
 
+    // Fetch favorited nsite/napplet manifests up front so tapping one launches immediately instead of
+    // showing "isn't loaded yet" until the user happens to visit the nsite/napplet feed.
+    PreloadFavoriteNostrApps(apps, accountViewModel)
+
     var field by remember { mutableStateOf(TextFieldValue("")) }
 
     // Favorites + visit history flattened into the neutral candidate shape the ranker consumes.
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/favorites/FavoriteAppsScreen.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/favorites/FavoriteAppsScreen.kt
index 4ecbed9bd1..1fc3bbac78 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/favorites/FavoriteAppsScreen.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/favorites/FavoriteAppsScreen.kt
@@ -69,6 +69,7 @@ import com.vitorpamplona.amethyst.commons.icons.symbols.MaterialSymbols
 import com.vitorpamplona.amethyst.favorites.BrowserIconRegistry
 import com.vitorpamplona.amethyst.favorites.FavoriteAppLauncher
 import com.vitorpamplona.amethyst.favorites.FavoriteAppsRegistry
+import com.vitorpamplona.amethyst.favorites.PreloadFavoriteNostrApps
 import com.vitorpamplona.amethyst.favorites.rememberNappletIconModel
 import com.vitorpamplona.amethyst.ui.navigation.bottombars.AppBottomBar
 import com.vitorpamplona.amethyst.ui.navigation.navs.INav
@@ -90,6 +91,10 @@ fun FavoriteAppsScreen(
     val context = LocalContext.current
     val apps by FavoriteAppsRegistry.favorites.collectAsStateWithLifecycle()
 
+    // Fetch favorited nsite/napplet manifests up front so a tap launches immediately instead of showing
+    // "isn't loaded yet" until the user happens to visit the nsite/napplet feed.
+    PreloadFavoriteNostrApps(apps, accountViewModel)
+
     Scaffold(
         topBar = {
             TopAppBar(title = { Text(stringResource(R.string.favorite_apps)) })