Piano practice tool with real-time chord detection, scale trainer, ear training, and music theory visualization. Connect your MIDI keyboard and start playing — no download, no install. Key Features: Chord Detection & Chord Explorer — see what you play in real-time Scale Trainer — practice 14 scale types with accuracy tracking Ear Training — intervals, chords, and scale recognition MIDI Player with falling notes — load any MIDI file Audio & YouTube Player — practice along with any song Diagram Generator — create chord charts and scale diagrams for teaching Piano Streaming Overlay — transparent overlay for OBS/Twitch Sheet Music Display — real-time notation of your playing Who it's for: Musicians with a MIDI keyboard looking for a browser-based practice tool Piano teachers creating visual materials Streamers needing a piano overlay Anyone learning chords, scales, and music theory Works on any device with a browser. Free core features, Premium for advanced tools.