Signal Generator is an open-source (GPL-3.0-only) Android app by Bill Farmer. The APK we host is 91 KB, it needs Android 6.0 or newer, and it declares 1 permission.
The file on this page is Signal Generator 1.37, 91.31 KB, and it installs on Android 6.0 and newer.
We compared the signing certificate of this build with the certificate recorded the first time org.billthefarmer.siggen 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 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
- 1.37
- Size
- 91.31 KB
- Requires Android
- API 23
- Package
- org.billthefarmer.siggen
- Signature checked on
- Sep 17, 2026
- Where this file came from
- F-Droid
- Licence
- GPL-3.0-only
- Source code
- Source for this version
File SHA-256: e2cad1884047d80856141432169baaf9313722188ef5881e9c2a15d78b1d3601
Signing certificate (SHA-256): 8934bbf44d2a887269278bc7640e0385728bcec49eb901dd2262f519a24b54c0
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
- WAKE_LOCK
Screenshots
