Creator · 2026 – now
FretFlow
A guitar practice app. Give it a song or a chord progression and it shows you where to go next on the fretboard.
I started it because I wanted a better way to practise the songs I like. It reads chords from audio or video, labels each chord with its Roman numeral, and can rearrange the same progression for a beginner or as R&B voicings up the neck.
- Web
- Live at fretflow.io
- iOS
- Submitted to the App Store on Oct 3, 2026. In review.
- Source
- Web app is open source (MIT). First public release June 11, 2026.
- Built with
- TypeScript, Next.js, Swift, SwiftUI, Python
FretFlow’s R&B arrangement of C – Am – G
Cmaj9I
C → Cmaj9 major 9th on the home chord, the basic neo-soul colour
The same three chords, moved up the neck. The Roman numerals don’t change; the flavour does.
