diff --git a/mobile/android/app/build.gradle b/mobile/android/app/build.gradle
index 7ea6f4e2da..f4cd8cb1ff 100644
--- a/mobile/android/app/build.gradle
+++ b/mobile/android/app/build.gradle
@@ -48,6 +48,7 @@ android {
   }
 
   buildFeatures {
+    buildConfig true
     compose true
   }
 
diff --git a/mobile/android/app/src/main/kotlin/app/alextran/immich/images/RemoteImagesImpl.kt b/mobile/android/app/src/main/kotlin/app/alextran/immich/images/RemoteImagesImpl.kt
index ad45723171..42eed0f4ba 100644
--- a/mobile/android/app/src/main/kotlin/app/alextran/immich/images/RemoteImagesImpl.kt
+++ b/mobile/android/app/src/main/kotlin/app/alextran/immich/images/RemoteImagesImpl.kt
@@ -7,6 +7,7 @@ import android.graphics.ColorSpace
 import android.graphics.ImageDecoder
 import android.os.Build
 import android.os.CancellationSignal
+import app.alextran.immich.BuildConfig
 import app.alextran.immich.core.SSLConfig
 import com.google.net.cronet.okhttptransport.CronetCallFactory
 import okhttp3.Call
@@ -24,12 +25,27 @@ import java.nio.ByteBuffer
 import java.util.concurrent.ConcurrentHashMap
 import java.util.concurrent.Executors
 import java.util.concurrent.TimeUnit
+import okhttp3.Interceptor
 
 data class RemoteRequest(
   val callback: (Result<Map<String, Long>>) -> Unit,
   val cancellationSignal: CancellationSignal,
 )
 
+class UserAgentInterceptor : Interceptor {
+  companion object {
+    const val USER_AGENT = "Immich_Android_${BuildConfig.VERSION_NAME}"
+  }
+
+  override fun intercept(chain: Interceptor.Chain): Response {
+    return chain.proceed(
+      chain.request().newBuilder()
+        .header("User-Agent", USER_AGENT)
+        .build()
+    )
+  }
+}
+
 class RemoteImagesImpl(context: Context) : RemoteImageApi {
   private val requestMap = ConcurrentHashMap<Long, RemoteRequest>()
   private val lockedBitmaps = ConcurrentHashMap<Long, Bitmap>()
@@ -96,6 +112,7 @@ class RemoteImagesImpl(context: Context) : RemoteImageApi {
         .enableBrotli(true)
         .setStoragePath(storageDir.absolutePath)
         .enableHttpCache(CronetEngine.Builder.HTTP_CACHE_DISK, CACHE_SIZE_BYTES)
+        .setUserAgent(UserAgentInterceptor.USER_AGENT)
         .build()
         .also { cronetEngine = it }
 
@@ -111,6 +128,7 @@ class RemoteImagesImpl(context: Context) : RemoteImageApi {
       )
 
       val builder = OkHttpClient.Builder()
+        .addInterceptor(UserAgentInterceptor())
         .dispatcher(Dispatcher().apply { maxRequestsPerHost = MAX_REQUESTS_PER_HOST })
         .connectionPool(connectionPool)
 
diff --git a/mobile/ios/Runner/Images/RemoteImagesImpl.swift b/mobile/ios/Runner/Images/RemoteImagesImpl.swift
index 78b6cca996..f3433bd385 100644
--- a/mobile/ios/Runner/Images/RemoteImagesImpl.swift
+++ b/mobile/ios/Runner/Images/RemoteImagesImpl.swift
@@ -20,6 +20,8 @@ class RemoteImageApiImpl: NSObject, RemoteImageApi {
   private static let delegate = RemoteImageApiDelegate()
   static let session = {
     let config = URLSessionConfiguration.default
+    let version = Bundle.main.object(forInfoDictionaryKey: "CFBundleShortVersionString") as? String ?? "unknown"
+    config.httpAdditionalHeaders = ["User-Agent": "Immich_iOS_\(version)"]
     let thumbnailPath = FileManager.default.temporaryDirectory.appendingPathComponent("thumbnails", isDirectory: true)
     try! FileManager.default.createDirectory(at: thumbnailPath, withIntermediateDirectories: true)
     config.urlCache = URLCache(