diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/LocalPreferences.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/LocalPreferences.kt
index 6241b7303..ee0a90908 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/LocalPreferences.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/LocalPreferences.kt
@@ -51,6 +51,7 @@ import com.vitorpamplona.quartz.events.MetadataEvent
 import com.vitorpamplona.quartz.events.MuteListEvent
 import com.vitorpamplona.quartz.events.PrivateOutboxRelayListEvent
 import com.vitorpamplona.quartz.events.SearchRelayListEvent
+import kotlinx.collections.immutable.toImmutableList
 import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.MutableStateFlow
@@ -555,8 +556,8 @@ object LocalPreferences {
                     dontTranslateFrom = dontTranslateFrom,
                     languagePreferences = languagePreferences,
                     translateTo = translateTo,
-                    zapAmountChoices = MutableStateFlow(zapAmountChoices),
-                    reactionChoices = MutableStateFlow(reactionChoices),
+                    zapAmountChoices = MutableStateFlow(zapAmountChoices.toImmutableList()),
+                    reactionChoices = MutableStateFlow(reactionChoices.toImmutableList()),
                     defaultZapType = MutableStateFlow(defaultZapType),
                     defaultFileServer = defaultFileServer,
                     defaultHomeFollowList = MutableStateFlow(defaultHomeFollowList),
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/model/AccountSettings.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/model/AccountSettings.kt
index c8fced48d..bc14a8cbf 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/model/AccountSettings.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/model/AccountSettings.kt
@@ -45,6 +45,9 @@ import com.vitorpamplona.quartz.events.SearchRelayListEvent
 import com.vitorpamplona.quartz.signers.ExternalSignerLauncher
 import com.vitorpamplona.quartz.signers.NostrSignerExternal
 import com.vitorpamplona.quartz.signers.NostrSignerInternal
+import kotlinx.collections.immutable.ImmutableList
+import kotlinx.collections.immutable.persistentListOf
+import kotlinx.collections.immutable.toImmutableList
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.map
@@ -61,7 +64,7 @@ val DefaultChannels =
     )
 
 val DefaultReactions =
-    listOf(
+    persistentListOf(
         "\uD83D\uDE80",
         "\uD83E\uDEC2",
         "\uD83D\uDC40",
@@ -92,7 +95,7 @@ val DefaultSearchRelayList =
         RelayUrlFormatter.normalize("wss://relay.noswhere.com"),
     )
 
-val DefaultZapAmounts = listOf(100L, 500L, 1000L)
+val DefaultZapAmounts = persistentListOf(100L, 500L, 1000L)
 
 fun getLanguagesSpokenByUser(): Set<String> {
     val languageList = ConfigurationCompat.getLocales(Resources.getSystem().getConfiguration())
@@ -118,8 +121,8 @@ class AccountSettings(
     var dontTranslateFrom: Set<String> = getLanguagesSpokenByUser(),
     var languagePreferences: Map<String, String> = mapOf(),
     var translateTo: String = Locale.getDefault().language,
-    var zapAmountChoices: MutableStateFlow<List<Long>> = MutableStateFlow(DefaultZapAmounts),
-    var reactionChoices: MutableStateFlow<List<String>> = MutableStateFlow(DefaultReactions),
+    var zapAmountChoices: MutableStateFlow<ImmutableList<Long>> = MutableStateFlow(DefaultZapAmounts),
+    var reactionChoices: MutableStateFlow<ImmutableList<String>> = MutableStateFlow(DefaultReactions),
     val defaultZapType: MutableStateFlow<LnZapEvent.ZapType> = MutableStateFlow(LnZapEvent.ZapType.PUBLIC),
     var defaultFileServer: Nip96MediaServers.ServerName = Nip96MediaServers.DEFAULT[0],
     val defaultHomeFollowList: MutableStateFlow<String> = MutableStateFlow(KIND3_FOLLOWS),
@@ -177,7 +180,7 @@ class AccountSettings(
 
     fun changeZapAmounts(newAmounts: List<Long>) {
         if (zapAmountChoices.value != newAmounts) {
-            zapAmountChoices.tryEmit(newAmounts)
+            zapAmountChoices.tryEmit(newAmounts.toImmutableList())
             saveAccountSettings()
         }
     }
@@ -191,7 +194,7 @@ class AccountSettings(
 
     fun changeReactionTypes(newTypes: List<String>) {
         if (reactionChoices.value != newTypes) {
-            reactionChoices.tryEmit(newTypes)
+            reactionChoices.tryEmit(newTypes.toImmutableList())
             saveAccountSettings()
         }
     }
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/model/MiniFhir.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/model/MiniFhir.kt
index e770d9d6c..be000225b 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/model/MiniFhir.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/model/MiniFhir.kt
@@ -21,6 +21,7 @@
 package com.vitorpamplona.amethyst.model
 
 import android.util.Log
+import androidx.compose.runtime.Stable
 import com.fasterxml.jackson.annotation.JsonSubTypes
 import com.fasterxml.jackson.annotation.JsonTypeInfo
 import com.fasterxml.jackson.databind.DeserializationFeature
@@ -40,11 +41,13 @@ import kotlinx.collections.immutable.toImmutableMap
     JsonSubTypes.Type(value = Bundle::class, name = "Bundle"),
     JsonSubTypes.Type(value = VisionPrescription::class, name = "VisionPrescription"),
 )
+@Stable
 open class Resource(
     var resourceType: String? = null,
     var id: String = "",
 )
 
+@Stable
 class Practitioner(
     resourceType: String? = null,
     id: String = "",
@@ -53,6 +56,7 @@ class Practitioner(
     var gender: String? = null,
 ) : Resource(resourceType, id)
 
+@Stable
 class Patient(
     resourceType: String? = null,
     id: String = "",
@@ -61,6 +65,7 @@ class Patient(
     var gender: String? = null,
 ) : Resource(resourceType, id)
 
+@Stable
 class HumanName(
     var use: String? = null,
     var family: String? = null,
@@ -69,6 +74,7 @@ class HumanName(
     fun assembleName(): String = given.joinToString(" ") + " " + family
 }
 
+@Stable
 class Bundle(
     resourceType: String? = null,
     id: String = "",
@@ -77,6 +83,7 @@ class Bundle(
     var entry: List<Resource> = arrayListOf(),
 ) : Resource(resourceType, id)
 
+@Stable
 class VisionPrescription(
     resourceType: String? = null,
     id: String = "",
@@ -89,6 +96,7 @@ class VisionPrescription(
     var lensSpecification: List<LensSpecification> = arrayListOf(),
 ) : Resource(resourceType, id)
 
+@Stable
 class LensSpecification(
     var eye: String? = null,
     var sphere: Double? = null,
@@ -105,6 +113,7 @@ class LensSpecification(
     var note: String? = null,
 )
 
+@Stable
 class Prism(
     var amount: Double? = null,
     var base: String? = null,
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/service/CashuProcessor.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/service/CashuProcessor.kt
index 0b3d465e7..485189e11 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/service/CashuProcessor.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/service/CashuProcessor.kt
@@ -32,6 +32,8 @@ import com.vitorpamplona.amethyst.ui.stringRes
 import com.vitorpamplona.ammolite.service.HttpClientManager
 import com.vitorpamplona.quartz.encoders.toHexKey
 import com.vitorpamplona.quartz.events.Event
+import kotlinx.collections.immutable.ImmutableList
+import kotlinx.collections.immutable.toImmutableList
 import kotlinx.serialization.ExperimentalSerializationApi
 import kotlinx.serialization.Serializable
 import kotlinx.serialization.cbor.ByteString
@@ -61,11 +63,11 @@ class Proof(
 )
 
 object CachedCashuProcessor {
-    val cashuCache = LruCache<String, GenericLoadable<List<CashuToken>>>(20)
+    val cashuCache = LruCache<String, GenericLoadable<ImmutableList<CashuToken>>>(20)
 
-    fun cached(token: String): GenericLoadable<List<CashuToken>> = cashuCache[token] ?: GenericLoadable.Loading()
+    fun cached(token: String): GenericLoadable<ImmutableList<CashuToken>> = cashuCache[token] ?: GenericLoadable.Loading()
 
-    fun parse(token: String): GenericLoadable<List<CashuToken>> {
+    fun parse(token: String): GenericLoadable<ImmutableList<CashuToken>> {
         if (cashuCache[token] !is GenericLoadable.Loaded) {
             checkNotInMainThread()
             val newCachuData = CashuProcessor().parse(token)
@@ -91,7 +93,7 @@ class CashuProcessor {
         val proofs: List<Proof>,
     )
 
-    fun parse(cashuToken: String): GenericLoadable<List<CashuToken>> {
+    fun parse(cashuToken: String): GenericLoadable<ImmutableList<CashuToken>> {
         checkNotInMainThread()
 
         if (cashuToken.startsWith("cashuA")) {
@@ -105,7 +107,7 @@ class CashuProcessor {
         return GenericLoadable.Error("Could not parse this cashu token")
     }
 
-    fun parseCashuA(cashuToken: String): GenericLoadable<List<CashuToken>> {
+    fun parseCashuA(cashuToken: String): GenericLoadable<ImmutableList<CashuToken>> {
         checkNotInMainThread()
 
         try {
@@ -129,10 +131,10 @@ class CashuProcessor {
                     CashuToken(cashuToken, mint, totalAmount, proofs)
                 }
 
-            return GenericLoadable.Loaded(converted)
+            return GenericLoadable.Loaded(converted.toImmutableList())
         } catch (e: Exception) {
             if (e is CancellationException) throw e
-            return GenericLoadable.Error<List<CashuToken>>("Could not parse this cashu token")
+            return GenericLoadable.Error("Could not parse this cashu token")
         }
     }
 
@@ -172,7 +174,7 @@ class CashuProcessor {
     )
 
     @OptIn(ExperimentalSerializationApi::class)
-    fun parseCashuB(cashuToken: String): GenericLoadable<List<CashuToken>> {
+    fun parseCashuB(cashuToken: String): GenericLoadable<ImmutableList<CashuToken>> {
         checkNotInMainThread()
 
         try {
@@ -205,7 +207,7 @@ class CashuProcessor {
                     CashuToken(cashuToken, mint, totalAmount, proofs)
                 }
 
-            return GenericLoadable.Loaded(converted)
+            return GenericLoadable.Loaded(converted.toImmutableList())
         } catch (e: Exception) {
             e.printStackTrace()
             if (e is CancellationException) throw e
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/components/AudioWaveformReadOnly.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/components/AudioWaveformReadOnly.kt
index ac1006b0f..2882d4179 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/components/AudioWaveformReadOnly.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/components/AudioWaveformReadOnly.kt
@@ -40,7 +40,6 @@ import androidx.compose.ui.graphics.BlendMode
 import androidx.compose.ui.graphics.Brush
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.SolidColor
-import androidx.compose.ui.graphics.drawscope.DrawStyle
 import androidx.compose.ui.graphics.drawscope.Fill
 import androidx.compose.ui.graphics.graphicsLayer
 import androidx.compose.ui.unit.Dp
@@ -67,7 +66,6 @@ private const val DEFAULT_GRAPHICS_LAYER_ALPHA: Float = 0.99F
 @Composable
 fun AudioWaveformReadOnly(
     modifier: Modifier = Modifier,
-    style: DrawStyle = Fill,
     waveformBrush: Brush = SolidColor(Color.White),
     progressBrush: Brush = SolidColor(Color.Blue),
     waveformAlignment: WaveformAlignment = WaveformAlignment.Center,
@@ -131,7 +129,7 @@ fun AudioWaveformReadOnly(
                         height = amplitude,
                     ),
                 cornerRadius = CornerRadius(spikeRadiusState.toPx(), spikeRadiusState.toPx()),
-                style = style,
+                style = Fill,
             )
             drawRect(
                 brush = progressBrush,
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/components/CashuRedeem.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/components/CashuRedeem.kt
index ba03e2147..b8c4294f7 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/components/CashuRedeem.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/components/CashuRedeem.kt
@@ -75,6 +75,7 @@ import com.vitorpamplona.amethyst.ui.theme.Size18Modifier
 import com.vitorpamplona.amethyst.ui.theme.Size20Modifier
 import com.vitorpamplona.amethyst.ui.theme.SmallishBorder
 import com.vitorpamplona.amethyst.ui.theme.StdHorzSpacer
+import kotlinx.collections.immutable.ImmutableList
 import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
@@ -98,8 +99,8 @@ fun CashuPreview(
 
     CrossfadeIfEnabled(targetState = cashuData, label = "CashuPreview", accountViewModel = accountViewModel) {
         when (it) {
-            is GenericLoadable.Loaded<List<CashuToken>> -> CashuPreview(it.loaded, accountViewModel)
-            is GenericLoadable.Error<List<CashuToken>> ->
+            is GenericLoadable.Loaded<ImmutableList<CashuToken>> -> CashuPreview(it.loaded, accountViewModel)
+            is GenericLoadable.Error<ImmutableList<CashuToken>> ->
                 Text(
                     text = "$cashutoken ",
                     style = LocalTextStyle.current.copy(textDirection = TextDirection.Content),
@@ -111,7 +112,7 @@ fun CashuPreview(
 
 @Composable
 fun CashuPreview(
-    tokens: List<CashuToken>,
+    tokens: ImmutableList<CashuToken>,
     accountViewModel: AccountViewModel,
 ) {
     tokens.forEach {
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/ReactionsRow.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/ReactionsRow.kt
index 592369453..0a4f2fb1d 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/ReactionsRow.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/ReactionsRow.kt
@@ -1329,7 +1329,7 @@ fun ReactionChoicePopup(
         onDismissRequest = { onDismiss() },
     ) {
         ReactionChoicePopupContent(
-            reactions.toImmutableList(),
+            reactions,
             toRemove = toRemove,
             onClick = { reactionType ->
                 accountViewModel.reactToOrDelete(
@@ -1487,7 +1487,7 @@ fun ZapAmountChoicePopup(
 @Composable
 fun ZapAmountChoicePopup(
     baseNote: Note,
-    zapAmountChoices: List<Long>,
+    zapAmountChoices: ImmutableList<Long>,
     accountViewModel: AccountViewModel,
     popupYOffset: Dp,
     onDismiss: () -> Unit,
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/discover/NIP90ContentDiscoveryScreen.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/discover/NIP90ContentDiscoveryScreen.kt
index 7f693f13b..ba760f832 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/discover/NIP90ContentDiscoveryScreen.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/discover/NIP90ContentDiscoveryScreen.kt
@@ -461,7 +461,7 @@ fun ZapDVMButton(
         if (wantsToZap != null) {
             ZapAmountChoicePopup(
                 baseNote = baseNote,
-                zapAmountChoices = listOf(amount / 1000),
+                zapAmountChoices = persistentListOf(amount / 1000),
                 popupYOffset = iconSize,
                 accountViewModel = accountViewModel,
                 onDismiss = {
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/events/TorrentEvent.kt b/quartz/src/main/java/com/vitorpamplona/quartz/events/TorrentEvent.kt
index 6d00f0c67..9c6a1291e 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/events/TorrentEvent.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/events/TorrentEvent.kt
@@ -121,6 +121,7 @@ class TorrentEvent(
     }
 }
 
+@Immutable
 class TorrentFile(
     val fileName: String,
     val bytes: Long?,