diff --git a/android/LocalAPI.aar b/android/LocalAPI.aar
new file mode 100644
index 0000000000..d263520b3b
Binary files /dev/null and b/android/LocalAPI.aar differ
diff --git a/android/build.gradle.kts b/android/build.gradle.kts
index f166454979..ccd702c095 100644
--- a/android/build.gradle.kts
+++ b/android/build.gradle.kts
@@ -111,6 +111,7 @@ dependencies {
 
   // Tailscale dependencies.
   implementation(files("libs/libtailscale.aar"))
+  implementation(files("LocalAPI.aar"))
 
   // Integration tests.
   androidTestImplementation(platform(libs.androidx.compose.bom))
diff --git a/android/src/main/java/com/tailscale/ipn/ui/model/Favorites.kt b/android/src/main/java/com/tailscale/ipn/ui/model/Favorites.kt
index 2dda8fbefe..fa7df90bae 100644
--- a/android/src/main/java/com/tailscale/ipn/ui/model/Favorites.kt
+++ b/android/src/main/java/com/tailscale/ipn/ui/model/Favorites.kt
@@ -3,44 +3,31 @@
 
 package com.tailscale.ipn.ui.model
 
-import kotlinx.serialization.SerialName
-import kotlinx.serialization.Serializable
-
-@Serializable
-data class FavoriteItem(
-    @SerialName("ID") var id: String? = null,
-    @SerialName("Name") var name: String? = null,
-)
-
-@Serializable
-data class Favorites(
-    @SerialName("Devices") val devices: List<FavoriteItem>? = null,
-    @SerialName("ExitNodes") val exitNodes: List<FavoriteItem>? = null,
-    @SerialName("Services") val services: List<FavoriteItem>? = null,
-) {
-  val deviceIds: List<StableNodeID> by lazy { devices.orEmpty().mapNotNull { it.id } }
-
-  fun isFavoriteDevice(id: StableNodeID): Boolean = id in deviceIds
-
-  fun withToggledDevice(id: StableNodeID): FavoritesRequest {
-    val current = devices.orEmpty()
-    val updated =
-        if (isFavoriteDevice(id)) {
-          current.filterNot { it.id == id }
-        } else {
-          current + FavoriteItem(id = id)
-        }
-    return FavoritesRequest(
-        pins = copy(devices = updated),
-        devicesSet = true,
-    )
-  }
-}
+import com.tailscale.localapi.PintypeItem
+import com.tailscale.localapi.PintypeSet
+import com.tailscale.localapi.SetPinsRequest
+
+typealias FavoriteItem = PintypeItem
+
+typealias Favorites = PintypeSet
+
+typealias FavoritesRequest = SetPinsRequest
 
-@Serializable
-data class FavoritesRequest(
-    @SerialName("Pins") val pins: Favorites,
-    @SerialName("DevicesSet") val devicesSet: Boolean? = null,
-    @SerialName("ExitNodesSet") val exitNodesSet: Boolean? = null,
-    @SerialName("ServicesSet") val servicesSet: Boolean? = null,
-)
+val Favorites.deviceIds: List<StableNodeID>
+  get() = devices.orEmpty().mapNotNull { it.ID }
+
+fun Favorites.isFavoriteDevice(id: StableNodeID): Boolean = id in deviceIds
+
+fun Favorites.withToggledDevice(id: StableNodeID): FavoritesRequest {
+  val current = devices.orEmpty()
+  val updated =
+      if (isFavoriteDevice(id)) {
+        current.filterNot { it.ID == id }
+      } else {
+        current + FavoriteItem(ID = id)
+      }
+  return FavoritesRequest(
+      pins = copy(devices = updated),
+      devicesSet = true,
+  )
+}
diff --git a/android/src/main/java/com/tailscale/ipn/ui/notifier/FavoritesManager.kt b/android/src/main/java/com/tailscale/ipn/ui/notifier/FavoritesManager.kt
index 46aaa319b3..ba1de2a0c2 100644
--- a/android/src/main/java/com/tailscale/ipn/ui/notifier/FavoritesManager.kt
+++ b/android/src/main/java/com/tailscale/ipn/ui/notifier/FavoritesManager.kt
@@ -10,6 +10,7 @@ import com.tailscale.ipn.ui.model.Ipn
 import com.tailscale.ipn.ui.model.Netmap
 import com.tailscale.ipn.ui.model.ProfileID
 import com.tailscale.ipn.ui.model.StableNodeID
+import com.tailscale.ipn.ui.model.withToggledDevice
 import com.tailscale.ipn.util.TSLog
 import kotlin.coroutines.resume
 import kotlin.time.Duration
diff --git a/android/src/main/java/com/tailscale/ipn/ui/view/MainView.kt b/android/src/main/java/com/tailscale/ipn/ui/view/MainView.kt
index ce2d994a57..95ff7ecadc 100644
--- a/android/src/main/java/com/tailscale/ipn/ui/view/MainView.kt
+++ b/android/src/main/java/com/tailscale/ipn/ui/view/MainView.kt
@@ -90,6 +90,7 @@ import com.tailscale.ipn.ui.model.IpnLocal
 import com.tailscale.ipn.ui.model.Netmap
 import com.tailscale.ipn.ui.model.Permissions
 import com.tailscale.ipn.ui.model.Tailcfg
+import com.tailscale.ipn.ui.model.isFavoriteDevice
 import com.tailscale.ipn.ui.theme.customErrorContainer
 import com.tailscale.ipn.ui.theme.disabled
 import com.tailscale.ipn.ui.theme.errorButton
diff --git a/android/src/main/java/com/tailscale/ipn/ui/view/PeerDetails.kt b/android/src/main/java/com/tailscale/ipn/ui/view/PeerDetails.kt
index d45d5a4586..02f5e22ac9 100644
--- a/android/src/main/java/com/tailscale/ipn/ui/view/PeerDetails.kt
+++ b/android/src/main/java/com/tailscale/ipn/ui/view/PeerDetails.kt
@@ -35,6 +35,7 @@ import androidx.compose.ui.text.AnnotatedString
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import com.tailscale.ipn.R
+import com.tailscale.ipn.ui.model.isFavoriteDevice
 import com.tailscale.ipn.ui.theme.listItem
 import com.tailscale.ipn.ui.theme.short
 import com.tailscale.ipn.ui.util.AndroidTVUtil.isAndroidTV
diff --git a/android/src/main/java/com/tailscale/ipn/ui/viewModel/MainViewModel.kt b/android/src/main/java/com/tailscale/ipn/ui/viewModel/MainViewModel.kt
index ac11fa7e8d..dd893a1c65 100644
--- a/android/src/main/java/com/tailscale/ipn/ui/viewModel/MainViewModel.kt
+++ b/android/src/main/java/com/tailscale/ipn/ui/viewModel/MainViewModel.kt
@@ -20,6 +20,7 @@ import com.tailscale.ipn.mdm.MDMSettings
 import com.tailscale.ipn.ui.model.Favorites
 import com.tailscale.ipn.ui.model.Ipn.State
 import com.tailscale.ipn.ui.model.Tailcfg
+import com.tailscale.ipn.ui.model.deviceIds
 import com.tailscale.ipn.ui.notifier.Notifier
 import com.tailscale.ipn.ui.util.PeerCategorizer
 import com.tailscale.ipn.ui.util.PeerSet
diff --git a/android/src/test/kotlin/com/tailscale/ipn/ui/notifier/FavoritesManagerTests.kt b/android/src/test/kotlin/com/tailscale/ipn/ui/notifier/FavoritesManagerTests.kt
index 225501cb3b..b213b86026 100644
--- a/android/src/test/kotlin/com/tailscale/ipn/ui/notifier/FavoritesManagerTests.kt
+++ b/android/src/test/kotlin/com/tailscale/ipn/ui/notifier/FavoritesManagerTests.kt
@@ -100,7 +100,7 @@ class FavoritesManagerTest {
     TSLog.libtailscaleWrapper = originalLogWrapper
   }
 
-  private fun favorites(vararg ids: String) = Favorites(devices = ids.map { FavoriteItem(id = it) })
+  private fun favorites(vararg ids: String) = Favorites(devices = ids.map { FavoriteItem(ID = it) })
 
   private fun TestScope.createManager(initial: Favorites = favorites()): FavoritesManager {
     val manager =
diff --git a/android/src/test/kotlin/com/tailscale/ipn/ui/util/FavoritesTest.kt b/android/src/test/kotlin/com/tailscale/ipn/ui/util/FavoritesTest.kt
index 3b2ab05b9d..7d88565c97 100644
--- a/android/src/test/kotlin/com/tailscale/ipn/ui/util/FavoritesTest.kt
+++ b/android/src/test/kotlin/com/tailscale/ipn/ui/util/FavoritesTest.kt
@@ -5,6 +5,9 @@ package com.tailscale.ipn.ui.util
 
 import com.tailscale.ipn.ui.model.FavoriteItem
 import com.tailscale.ipn.ui.model.Favorites
+import com.tailscale.ipn.ui.model.deviceIds
+import com.tailscale.ipn.ui.model.isFavoriteDevice
+import com.tailscale.ipn.ui.model.withToggledDevice
 import kotlinx.serialization.encodeToString
 import kotlinx.serialization.json.Json
 import org.junit.Assert.assertEquals
@@ -15,7 +18,7 @@ import org.junit.Test
 
 class FavoritesTest {
 
-  private fun ids(favorites: Favorites) = favorites.devices?.mapNotNull { it.id }
+  private fun ids(favorites: Favorites) = favorites.devices?.mapNotNull { it.ID }
 
   @Test
   fun emptyFavoritesHasNoPinnedDevices() {
@@ -31,9 +34,9 @@ class FavoritesTest {
         Favorites(
             devices =
                 listOf(
-                    FavoriteItem(id = "n1"),
+                    FavoriteItem(ID = "n1"),
                     FavoriteItem(name = "no id"),
-                    FavoriteItem(id = "n2"),
+                    FavoriteItem(ID = "n2"),
                 )
         )
 
@@ -42,14 +45,14 @@ class FavoritesTest {
 
   @Test
   fun togglingAnUnpinnedDeviceAddsIt() {
-    val request = Favorites(devices = listOf(FavoriteItem(id = "n1"))).withToggledDevice("n2")
+    val request = Favorites(devices = listOf(FavoriteItem(ID = "n1"))).withToggledDevice("n2")
 
     assertEquals(listOf("n1", "n2"), ids(request.pins))
   }
 
   @Test
   fun togglingAPinnedDeviceRemovesIt() {
-    val favorites = Favorites(devices = listOf(FavoriteItem(id = "n1"), FavoriteItem(id = "n2")))
+    val favorites = Favorites(devices = listOf(FavoriteItem(ID = "n1"), FavoriteItem(ID = "n2")))
 
     assertEquals(listOf("n2"), ids(favorites.withToggledDevice("n1").pins))
   }
@@ -67,15 +70,15 @@ class FavoritesTest {
   fun togglePreservesExitNodesAndServices() {
     val favorites =
         Favorites(
-            devices = listOf(FavoriteItem(id = "n1")),
-            exitNodes = listOf(FavoriteItem(id = "x1")),
-            services = listOf(FavoriteItem(id = "s1")),
+            devices = listOf(FavoriteItem(ID = "n1")),
+            exitNodes = listOf(FavoriteItem(ID = "x1")),
+            services = listOf(FavoriteItem(ID = "s1")),
         )
 
     val request = favorites.withToggledDevice("n1")
 
-    assertEquals(listOf("x1"), request.pins.exitNodes?.map { it.id })
-    assertEquals(listOf("s1"), request.pins.services?.map { it.id })
+    assertEquals(listOf("x1"), request.pins.exitNodes?.map { it.ID })
+    assertEquals(listOf("s1"), request.pins.services?.map { it.ID })
   }
 
   @Test
@@ -91,7 +94,7 @@ class FavoritesTest {
   @Test
   fun unpinningTheLastDeviceSendsAnExplicitEmptyList() {
     // An omitted Devices key would mean "no change" to the backend
-    val request = Favorites(devices = listOf(FavoriteItem(id = "nodeA"))).withToggledDevice("nodeA")
+    val request = Favorites(devices = listOf(FavoriteItem(ID = "nodeA"))).withToggledDevice("nodeA")
 
     assertEquals("""{"Pins":{"Devices":[]},"DevicesSet":true}""", Json.encodeToString(request))
   }
@@ -104,7 +107,7 @@ class FavoritesTest {
     val favorites = Json { ignoreUnknownKeys = true }.decodeFromString<Favorites>(json)
 
     assertTrue(favorites.isFavoriteDevice("nodeA"))
-    assertEquals("nodeA", favorites.devices?.single()?.id)
+    assertEquals("nodeA", favorites.devices?.single()?.ID)
     assertNull(favorites.exitNodes)
     assertEquals(emptyList<FavoriteItem>(), favorites.services)
   }