An open-source Syncthing client for iPhone and Android.
About this app
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.
Licensed under MPL-2.0, by Siddarth Kumar.
What's New in v1.1.15
Imported from the F-Droid repository index.
Version history
Jun 27, 2026 · 64.5 MB · Android API 24–36 · code 29708089
Imported from the F-Droid repository index.
SHA-256 f86910b7b4a220e1c9ba2f65375039ca1a30d697ad5665f87bc49275bd2c59c5
May 28, 2026 · 62.3 MB · Android API 24–36 · code 29664507
Imported from the F-Droid repository index.
SHA-256 82a3103b2d15933cc1e992b8f82b062ccf7880d12740950493d592e41da6afeb
May 2, 2026 · 62.1 MB · Android API 24–36 · code 29628615
Imported from the F-Droid repository index.
SHA-256 1437f2448aab51e4fa3dcb4c75e33c60be4d63357d6c741590b116b4974a7c12
Will it run on your device?
78%
- Runs on a broad range of modern Android versions.
- ABI coverage is focused on newer 64-bit devices.
- Aligned with the latest Android target SDK expectations.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be com.siddarthkay.syncup is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
If the current release misbehaves, 1.1.14 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall SyncUp first — which clears its local data unless you have a backup. Reinstall the older APK only if its signing fingerprint matches the build you already trust, and check the API range: an older release may target an Android version your device has moved past.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of SyncUp, and a listing is removed when the evidence for it stops holding up.
Get SyncUp
Every source we list for com.siddarthkay.syncup is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
f86910b7b4a220e1c9ba2f65375039ca1a30d697ad5665f87bc49275bd2c59c5
Signing certificate
813fe1ade9c8041814ad151f8bf7767421d0f4b962668812083117d9d81d5dae
Permissions Required
What each permission lets SyncUp do. A highlighted one is worth a second look — not necessarily wrong, just worth asking whether this app needs it.
Previous Versions
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
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