Zimly S3 Backup is an open-source (GPL-3.0-only) Android app by zimly. The APK we host is 9.5 MB, it needs Android 10 or newer, and it declares 10 permissions.
The file on this page is Zimly S3 Backup 3.4.1, 9.45 MB, and it installs on Android 10 and newer.
We compared the signing certificate of this build with the certificate recorded the first time app.zimly.backup entered the site, and published both the file's SHA-256 and the certificate's fingerprint above so you can check the download yourself. That comparison says the file was not repackaged by someone else; it is not a review of what the app does.
The manifest inside the APK declares 10 permissions, none of which cover contacts, location, SMS, the camera or the microphone.
Its licence is GPL-3.0-only. We took this build from F-Droid, and the source for this exact version is linked below.
We do not show a star rating or an install count for this page: we have no measured figure for either, and a number we cannot source is worth less than an empty field.
- Version
- 3.4.1
- Size
- 9.45 MB
- Requires Android
- API 29
- Package
- app.zimly.backup
- Signature checked on
- Sep 19, 2026
- Where this file came from
- F-Droid
- Licence
- GPL-3.0-only
- Source code
- Source for this version
File SHA-256: 43ed539af99b8280ae6f8f352b9ac5f976844c69d0e9aa9deaf566e77ff5e75b
Signing certificate (SHA-256): fa1b7200ce4aa34d41ac35e4474f3699a4a2fbc7c62019495d4b2b3429c94be7
We check that this file carries the same signing certificate as earlier releases of the same package. That shows the APK was not repackaged by someone else — it is not a security review of the app.
Declared permissions
- INTERNET
- READ_MEDIA_IMAGES
- READ_MEDIA_VIDEO
- ACCESS_MEDIA_LOCATION
- READ_EXTERNAL_STORAGE
- WAKE_LOCK
- ACCESS_NETWORK_STATE
- RECEIVE_BOOT_COMPLETED
- FOREGROUND_SERVICE
- app.zimly.backup.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Screenshots
