Crystal Ball
de.singular.crystalballDetects guitar chords and combines them into song sheets.
Latest documented release0.526 Aug 2026 · 13.1 MB→01 / Overview
Is Crystal Ball safe?
Crystal Ball listens to your guitar and tells you what chord you just played. Press Detect single chord, strum, and it names the chord and draws how to fret it — with the chords it nearly picked instead one tap away, and other ways to play the same one further up the neck. Capture a whole part and it becomes a song sheet you can keep, correct and share. Early-stage release — expect rough edges. F…
- Developer
- Kreuder
- Category
- Multimedia
- Earliest archived version
- 26 Aug 2026
- License
- GPL-3.0-only (per F-Droid metadata)
02 / Release notes
Release notes from F-Droid
The chord library now goes well past what the microphone can name. • Thirteen more qualities — dim, aug, m7b5, dim7, 7sus4, 6, m6, add9, 9, maj9, m9, 6/9 and 13, at every root. 240 chords, up from 84. • Look them up, or name one by hand when writing a part down. Use the new chip beside the…
Full notes →03 / Package identity
Technical fingerprint
de.singular.crystalballb3a541365bdcfeccb4ed63af95be9374cc6748c41e35b89972a7329ff8e84b19DF:EC:D8:AC:BA:7B:49:CA:D0:93:1C:24:2B:B7:4F:93:DF:21:09:9B:C1:A1:C0:78:97:49:CE:B5:FF:B3:51:5F04 / Version archive
Documented releases
1 TOTAL05 / Safety & access
Safety verdict
Declared permissions
Tracker status: Not assessed by WIKI for Android.
06 / Sources
Evidence ledger
Each entry is a captured public reference backing this record.