Hey HN, FretLabs is a web application I've built to make guitar scale practice more engaging and productive. It started as a personal project to give a little structure to my freestyle sessions and has since evolved considerably.

https://www.youtube.com/watch?v=8709yXI82ms

Features:

- 10,000+ song catalog (growing daily), or upload your own MP3s

- Automatic key signature and song section detection

- Dynamic fretboard visualization with customizable options/controls

- Left-handed mode, note highlighting, and support for 4, 6, and 7 string guitars

- Mobile, Tablet, & Desktop Compatibility

We’re launching soon for $3/mo - if you'd like to be notified: https://fretlabs.m-pages.com/R0IMpC/fretlabspromoform

I'd love to hear your thoughts, feedback, or answer any questions!