ChartKeys

Version 1 is here! Pick a chord chart, and jam along with the band in your tempo. Free version with no time limit. One-time Pro upgrade. No account, works offline.

ChartKeys: Your Chill But Smart Piano Jam Buddy

Jam along with an auto backing band, based only on chords and style, with detailed stats over time.

Disclaimer: This is not a "beginner learn piano" app. No falling notes here!

If you are still reading, have a basic understanding of chords like Bm and A7, and maybe even a MIDI keyboard - you might like this!

Whether you want to actively learn, expand your comfort zone, musical vocabulary, or just noodle along and have fun, is completely up to you. No study plan here, no tests, only some play stats if you ever feel curious.

• Jam along with an auto backing band, based only on chords and style

• 20 bundled demo loops
• three-lane backing band: drums, bass, keys/guitar
• backing styles including pop, rock, jazz/swing, bossa, funk/soul, waltz, shuffle, etc.
• adjust tempo as you like (50-150%, the band replays it, no time-stretched weirdness)
• adjust your loudness relative to the band as you like
• mute each backing instrument as you please
• choose your instrument: Grand Piano, E-Piano x2, Clavinet, Drawbar Organ, Synth Lead
• chords lane follows the beat
• optional chord keys highlighting
• onscreen keyboard or MIDI (wired/Bluetooth)

• ChartKeys listens to what you play, and roots for you!

• daily activity chart, daily streaks (but no annoying reminders)
• statistics over time on your common chords, intervals
• detects your commonly used musical phrases/lines across songs
• shows where you land on chord changes in solos (root, 3rd, 5th, 7th, etc.)
• the keys you play in, laid out on the circle of fifths
• describes your journey, never judges: no scores, no verdicts, no red crosses
• share your stats conveniently as images if that seems fun or useful

• Everything in one songbook

• demo loops, imported playlists and your own loops, with search and favorites

• No account, no sign-up, no cloud

• what you play stays on your device
• nothing personally identifying is ever uploaded, not even an install id
• works offline

• Play the free version as long as you like

• 20 demo loops, full backing, full player stats, play controls included with no limit

• Unlock lifetime Pro features with a one-time payment

• change backing style for any song
• change song key (transpose)
• edit chords (tap and hold directly in the chords lane)
• create your own chord charts (basic editor, up to 16 bars, fixed grid of chords to edit)
• import thousands of chord charts available online via copy-paste (irealb:// compatible)
• export your chord charts via copy-paste