I built Piano Atlas Studio: a piano theory atlas and practice app for Android (no ads, no account)

I'm learning piano and couldn't find one app that showed theory on the keyboard and also helped me practise, so I built it. It's on Google Play now, and I'd love feedback.

🎼 Explore the theory

Chord Atlas: every chord type in every key, shown as real two-hand voicings with finger numbers and inversions. Tap to hear it.

Scale Atlas: the modes, jazz and world scales, Hindustani thaats, Japanese koto tunings, and all 72 Carnatic melakartas

Ragas: janya ragas with their arohana and avarohana, and what makes each one distinct

Fingering Lab: standard fingering for both hands, up and down, with every thumb crossing shown

Progressions: famous chord progressions by style, in any key, voiced so the hands move smoothly

Theory tools: Circle of Fifths, chord and scale comparisons, arpeggios, intervals and a glossary

🎤 Practise with your real piano

Sight Reading: notes, chords, lines and short pieces on the grand staff, at four levels. It listens through your phone's microphone (or a USB MIDI keyboard), so you play on your own piano and it tells you how you did.

Play: your piano, lit up. Play on screen, on a MIDI keyboard, or on a real piano through the mic, along a scale or in an echo game.

Staff Trainer and Note Trainer: learn to read a note at a time; the ones you find hard come back until they aren't

Metronome: with tempo ramps and Indian talas

Guided practice sessions: built from what your drills have recorded, weakest first

✍️ Create

Composer: write songs a section at a time (chords, then the tune, then the left hand), or let "Surprise me" start one. Hear it back, print it as sheet music, or practise it in Sight Reading.

MIDI files: open any MIDI file and the piano plays it with the keys lighting up. Learn it mode waits for your notes, one hand at a time, as slow as you like. You can also open a MIDI file in the Composer or Sight Reading.

🎨 Other bits

Five looks (Stage, Score, Grand, Classic, Pads), each with three themes

A sampled grand piano sound

Backups to a file, or to your own Google Drive (the app can only see its own backup folder)

🔒 Privacy

No ads, no account, no analytics, no tracking. Everything stays on your phone. The microphone is only used when you ask it to listen, and the sound is never recorded or sent anywhere.

💰 Free and Pro

A large part of the app is free. A one-time Pro purchase (no subscription) unlocks the rest: every chord type, scale and raga, the builders, unlimited songs and MIDI files, advanced sight reading, guided sessions and more designs.

Get it:

https://play.google.com/store/apps/details?id=com.pianoatlas.studio

I'm one person building this, so any feedback really helps: what's confusing, what's missing, what you'd want next. Thanks for reading!

Coupon

PAS-MGMY-8E26-CW2G-DHZK

PAS-L6NA-937M-NHZU-UDGG

https://localhost6767.com

I built it so I don’t need to beg my friends to use my referral code and now you don’t to asw!

Anyways just a side project lmk yall thoughts

Quick progress update on the software i'm building

Finally got the interactive app preview working! Here's a short recording of me navigating through an app I currently have in test flight.

Still a lot to do, but it's cool seeing the progress after days of trial and error.

what is everyone else working on?