Rubber Ring is an open-source (GPL-3.0-only) Android app by Kreuder. The APK we host is 13 MB, it needs Android 8.0 or newer, and it declares 1 permission.
The file on this page is Rubber Ring 0.14, 13.21 MB, and it installs on Android 8.0 and newer.
We compared the signing certificate of this build with the certificate recorded the first time de.singular.looper 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 1 permission, 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
- 0.14
- Size
- 13.21 MB
- Requires Android
- API 26
- Package
- de.singular.looper
- Signature checked on
- Oct 23, 2026
- Where this file came from
- F-Droid
- Licence
- GPL-3.0-only
- Source code
- Source for this version
File SHA-256: d3b470511327cadabdd9fd827449c6a8a3334414e610394e6a10998aa9ffb134
Signing certificate (SHA-256): d27687051e30d6f7098dd66d686d2260c42aa4a9ad14aa61a08a4c255b78e9a5
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
- de.singular.looper.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Screenshots
