About this app
The Good (Mandolin) Book is your all in one resource for Mandolin chords and scales. Quickly pick a chord or scale with intuitive picker. Then simply swipe left and right to view the different voicings of the chord. Then, once you've got a key to play in, use the quick reference to choose chords that make for great accompaniment.
Latest release
What’s New
Updated to support modern screen sizes.
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 20, 2026 · 2:36 AM $1.99
Screenshots
