PianoKeys Learn vs AllyPiano

PianoKeys is an offline piano and chord-study tool built for learners who value precision, speed, and clean design. SYNTHESIZED AUDIO ENGINE PianoKeys uses a custom AVAudioEngine-based synthesizer with 8-voice polyphony and exponential decay envelopes. Every note is generated on-device in real time — no audio samples, no network dependency, zero latency. COMPLETE CHORD LIBRARY 21 chords across three categories: - 7 Major triads (C, D, E, F, G, A, B) - 7 Minor triads (Cm, Dm, Em, Fm, Gm, Am, Bm) - 7 Dominant 7th chords (C7, D7, E7, F7, G7, A7, B7) Each chord card shows the chord symbol and full name, plays all intervals simultaneously, and highlights the constituent keys on the keyboard display. PIANO KEYBOARD Scrollable 2-octave keyboard spanning C2–C5. White and black keys respond to touch with spring animation and haptic feedback. Pressed keys are highlighted with accent color in real time. PRACTICE ANALYTICS - Daily session count - All-time total plays - Top 5 most-played chords by frequency All data is persisted via UserDefaults — no account, no server, no tracking. TECHNICAL SPECIFICATIONS - Platform: iOS 16+, iPhone Only - Audio: AVAudioEngine, 44100 Hz, 8-voice polyphony - Localization: English, Simplified Chinese - Storage: UserDefaults (local only) - Network: None required Delete the app to permanently remove all practice data.

Play a full 88-key keyboard on your iPhone or iPad. Grand Piano brings the sound of a sampled piano, while Midnight adds a glowing synth keyboard with warm, detuned voices. Both instruments are included. For an expressive concert piano, unlock Salamander Grand with a one-time in-app purchase. It includes four recorded velocity layers and the Ivory Concert appearance, with detailed piano sound and sculpted ivory and ebony keys. Play chords, glide between notes, and latch the sustain pedal. Slide the rail to travel the keyboard, or center it on a note. Transpose up or down by up to an octave to play in any key with the same fingering. Adjust key size and note labels to fit your hands. Your settings are remembered. FEATURES • Full 88-key range, A0 to C8 • Grand Piano and Midnight included • Optional Salamander Grand and Ivory Concert unlock • Multi-touch chords and glissando • Sustain pedal latch • Transpose from −12 to +12 semitones • Adjustable key size, centered note, and labels • Bundled sounds for offline playing after ownership is verified • Restore Purchases with your App Store account • No subscriptions or additional app account Made for iPhone and iPad in landscape. Purchasing and restoring require access to the App Store.