Know every note on your guitar. 110+ structured courses across 8 series, 16 exercise modes, and an adaptive engine that builds real fretboard fluency — from your first note to complete mastery.https://fretsnotes.com/https://fretsnotes.com/blog/introducing-fretsnotes/https://fretsnotes.com/blog/introducing-fretsnotes/We are building an app that teaches music theory and applies it immediately on your guitar — with 110+ structured courses, 16 exercise modes, and intelligent practice.Sun, 15 Feb 2026 00:00:00 GMThttps://fretsnotes.com/blog/android-launch/https://fretsnotes.com/blog/android-launch/We built the full Android app from scratch using Kotlin and Jetpack Compose, powered by the same Rust engine that runs on iOS.Fri, 20 Feb 2026 00:00:00 GMThttps://fretsnotes.com/blog/exercise-deep-dive/https://fretsnotes.com/blog/exercise-deep-dive/A deep dive into the 16 exercise modes in FretsNotes — how they work together to build real fretboard knowledge from multiple angles.Sun, 01 Mar 2026 00:00:00 GMThttps://fretsnotes.com/blog/curriculum-system/https://fretsnotes.com/blog/curriculum-system/How we structured 110+ courses across 8 series to take you from your first note to reading, hearing, and playing across the entire fretboard.Thu, 26 Feb 2026 00:00:00 GMThttps://fretsnotes.com/blog/the-engine/https://fretsnotes.com/blog/the-engine/Why we chose Rust for the core exercise engine, and how UniFFI lets us share it across iOS, Android, and the upcoming web app.Mon, 23 Feb 2026 00:00:00 GMThttps://fretsnotes.com/blog/beta-progress/https://fretsnotes.com/blog/beta-progress/A recap of where FretsNotes stands — iOS and Android live, 110+ courses across 8 series, and a look at what we are building next.Wed, 04 Mar 2026 00:00:00 GMThttps://fretsnotes.com/blog/practice-hub-android-update/https://fretsnotes.com/blog/practice-hub-android-update/Server-configurable exercise unlocks, curriculum switching on Android, and a round of bug fixes that make the app feel much more polished.Fri, 13 Mar 2026 00:00:00 GMT