Subster is an open-source (MIT) Android app by Rouven Volkmann. The APK we host is 3.3 MB, it needs Android 5.1 or newer, and it declares 4 permissions.
The file on this page is Subster 0.1.8, 3.27 MB, and it installs on Android 5.1 and newer.
We compared the signing certificate of this build with the certificate recorded the first time app.subster 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 declares 4 permissions, none of which cover contacts, location, SMS, the camera or the microphone.
Its licence is MIT. We took this build from F-Droid, and the source for this exact version is linked below.
F-Droid, who build and sign this package, flag it: it relies on a network service that is not open source and only works with one specific server, which is not open source. We pass that on as they recorded it — we have not tested the app ourselves.
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
- 0.1.8
- Size
- 3.27 MB
- Requires Android
- API 22
- Package
- app.subster
- Signature checked on
- Sep 17, 2026
- Where this file came from
- F-Droid
- Licence
- MIT
- Source code
- Source for this version
File SHA-256: faef4b22240c87c6602558defaaf2073857b2a1007270fbdd1da486738d9665d
Signing certificate (SHA-256): c42473cefd0fadf93c8ba058b72bef25fece9c9cbd0c62a5423413ab22541df6
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
- FOREGROUND_SERVICE
- FOREGROUND_SERVICE_MEDIA_PLAYBACK
- app.subster.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Screenshots
