SyncUp

An open-source Syncthing client for iPhone and Android.

An open-source Syncthing client for iPhone and Android, powered by the Syncthing daemon via gomobile.

Syncthing's official Android client was archived in December 2024. No single client ran on both phones from one codebase, so this one was built. The daemon runs in-process via gomobile, with a React Native UI scaffolded from react-native-go.

Differences from other clients:

Daemon runs in-process on Android. The Go daemon lives inside the app via gomobile. There is no subprocess to manage, no IPC between a background service and the UI, and no service-restart handling.

Auto-accept folders from trusted peers. When you add a peer, you can toggle auto-accept so any folder they share is added to your device automatically without a prompt. Other pending offers show up as accept/ignore cards in the Folders tab.

QR pairing works both ways. Display your device's QR for a peer to scan, or scan theirs. The 56-character device ID never needs to be typed by hand.

UI updates in near real time. Long-polling /rest/events means config changes, folder state, and incoming offers reach the UI in about a second, instead of on a polling interval.

Versions

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

Download F-Droid

Version 1.1.14 (29664507) suggested Added on May 28, 2026

arm64-v8a

This version requires Android 7.0 or newer.

It is built and signed by the original developer, and guaranteed to correspond to this source tarball.
Permissions
- view network connections
  
  Allows the app to view information about network connections such as which networks exist and are connected.
- view Wi-Fi connections
  
  Allows the app to view information about Wi-Fi networking, such as whether Wi-Fi is enabled and name of connected Wi-Fi devices.
- take pictures and videos
  
  This app can take pictures and record videos using the camera while the app is in use.
- allow Wi-Fi Multicast reception
  
  Allows the app to receive packets sent to all devices on a Wi-Fi network using multicast addresses, not just your phone. It uses more power than the non-multicast mode.
- android.permission.DOWNLOAD_WITHOUT_NOTIFICATION
- run foreground service
  
  Allows the app to make use of foreground services.
- run foreground service with the type "dataSync"
  
  Allows the app to make use of foreground services with the type "dataSync"
- run foreground service with the type "specialUse"
  
  Allows the app to make use of foreground services with the type "specialUse"
- have full network access
  
  Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
- android.permission.MANAGE_EXTERNAL_STORAGE
- show notifications
  
  Allows the app to show notifications
- read the contents of your shared storage
  
  Allows the app to read the contents of your shared storage.
- read image files from shared storage
  
  Allows the app to read image files from your shared storage.
- read video files from shared storage
  
  Allows the app to read video files from your shared storage.
- read user selected image and video files from shared storage
  
  Allows the app to read image and video files that you select from your shared storage.
- run at startup
  
  Allows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
- ask to ignore battery optimizations
  
  Allows an app to ask for permission to ignore battery optimizations for that app.
- This app can appear on top of other apps
  
  This app can appear on top of other apps or other parts of the screen. This may interfere with normal app usage and change the way that other apps appear.
- control vibration
  
  Allows the app to control the vibrator.
- prevent phone from sleeping
  
  Allows the app to prevent the phone from going to sleep.
- modify or delete the contents of your shared storage
  
  Allows the app to write the contents of your shared storage.
- com.siddarthkay.syncup.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 62 MiB PGP Signature | Build Log
Version 1.1.12 (29628615) - Added on May 02, 2026

arm64-v8a

This version requires Android 7.0 or newer.

It is built and signed by the original developer, and guaranteed to correspond to this source tarball.
Permissions
- view network connections
  
  Allows the app to view information about network connections such as which networks exist and are connected.
- view Wi-Fi connections
  
  Allows the app to view information about Wi-Fi networking, such as whether Wi-Fi is enabled and name of connected Wi-Fi devices.
- take pictures and videos
  
  This app can take pictures and record videos using the camera while the app is in use.
- allow Wi-Fi Multicast reception
  
  Allows the app to receive packets sent to all devices on a Wi-Fi network using multicast addresses, not just your phone. It uses more power than the non-multicast mode.
- android.permission.DOWNLOAD_WITHOUT_NOTIFICATION
- run foreground service
  
  Allows the app to make use of foreground services.
- run foreground service with the type "dataSync"
  
  Allows the app to make use of foreground services with the type "dataSync"
- have full network access
  
  Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
- show notifications
  
  Allows the app to show notifications
- read the contents of your shared storage
  
  Allows the app to read the contents of your shared storage.
- read image files from shared storage
  
  Allows the app to read image files from your shared storage.
- read video files from shared storage
  
  Allows the app to read video files from your shared storage.
- read user selected image and video files from shared storage
  
  Allows the app to read image and video files that you select from your shared storage.
- This app can appear on top of other apps
  
  This app can appear on top of other apps or other parts of the screen. This may interfere with normal app usage and change the way that other apps appear.
- control vibration
  
  Allows the app to control the vibrator.
- prevent phone from sleeping
  
  Allows the app to prevent the phone from going to sleep.
- modify or delete the contents of your shared storage
  
  Allows the app to write the contents of your shared storage.
- com.siddarthkay.syncup.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 62 MiB PGP Signature | Build Log

Versions

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