Crystal Ball 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 2 permissions.
The file on this page is Crystal Ball 0.5, 13.10 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.crystalball 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 2 permissions, including access to the microphone. Android asks you to approve those the first time the app needs them.
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
- 0.5
- Size
- 13.10 MB
- Requires Android
- API 26
- Package
- de.singular.crystalball
- 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: b3a541365bdcfeccb4ed63af95be9374cc6748c41e35b89972a7329ff8e84b19
Signing certificate (SHA-256): dfecd8acba7b49cad0931c242bb74f93df21099bc1a1c0789749ceb5ffb3515f
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
- RECORD_AUDIO
- de.singular.crystalball.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Screenshots
