Croak: Piano Teacher

Hear yourself improve, practice piano. Adaptive sight-reading, real-time feedback, and a full music library. The smarter way to practice piano, at your own pace.

Whether you are playing your first notes or working through intermediate repertoire, Croak: Piano Teacher meets you where you are. Built for iPhone and iPad, the app listens as you play, adapts to your level, and gives you immediate feedback on every note, so every practice session is as productive as possible.

REAL-TIME NOTE DETECTION

Croak uses on-device machine learning to identify the notes you play through your device's microphone in real time, polyphonically, meaning it can detect multiple notes at once. No MIDI cable. No external hardware. Just sit at your instrument and play. The detection runs entirely on your device, with no audio ever sent to external servers.

SIGHT-READING EXERCISES

Sharpen your reading skills with dynamically generated exercises. Notes, key signatures, and clefs are selected based on your current proficiency level and gradually expanded as you improve, from natural notes in C major to accidentals across all major keys. Each exercise is graded on both accuracy and response time, giving you an objective measure of your progress after every session.

MUSIC LIBRARY

Practice with real pieces across six genres: Classical, Pop, Rock, Jazz, Children's Songs, and Holiday music. Each piece is presented bar by bar, so you can focus on the sections that need the most attention without losing your place in the score. Save your favorites for quick access at any time, and pick up exactly where you left off.

ADAPTIVE LEVELING

Croak tracks your accuracy, response speed, and session streaks across every exercise to calculate a proficiency level from 1 to 10. As your level rises, exercises introduce wider note ranges, new key signatures, and greater rhythmic variety. The system rewards consistent practice with streak bonuses and keeps a full history of your sessions so you can see exactly how far you have come.

WHO IT IS FOR

· Beginners taking their first steps on the piano · Students who want to practise independently between lessons · Intermediate players improving their sight-reading · Anyone returning to piano after a break · Teachers looking for a practice companion for their students

BUILT FOR EVERYONE

Accessibility is a first-class feature, not an afterthought.

· Colour palette certified at WCAG Triple-A (AAA) contrast ratio · OpenDyslexic font option available in Settings · Full Dynamic Type support, text scales with your system settings · Adaptive layout for both portrait and landscape orientations · Optimised for iPhone and iPad, including Stage Manager on iPadOS

AVAILABLE IN SIX LANGUAGES

English, French, German, Italian, Portuguese (Brazil), and Spanish. The interface, exercises, and feedback screens are fully localised in all six languages.

OPTIONAL CLOUD SYNC

Sign in with Apple to keep your learning profile, level, streaks, favourite pieces, and full session history, in sync across all your devices. Prefer to stay offline? Every core feature works without an account or an internet connection. Your data stays on your device until you choose to sync it.

YOUR PRIVACY

Croak never shares your data with third parties. iCloud synchronisation is entirely optional and uses Apple's private CloudKit infrastructure. The microphone is only active during active practice sessions and is never accessed in the background.

Download Croak: Piano Teacher and start playing today.