Keymap: Song Key & BPM Finder
Keymap turns any song into a practice tool — entirely on your iPhone.
Learning a song by ear means hunting for the key, guessing the chords, rewinding the same four bars and fighting the vocal on top of the part you want to hear. Keymap does the listening work for you: it splits the song into instruments, finds the key, tempo and chords, and gives you a loop, a slow-downer and a tuner in one place. The analysis runs on the device — songs are not uploaded anywhere.
Hear every part
- Split a song into vocals, drums, bass, guitar, piano and other.
- Mute the vocals for an instant backing track or karaoke.
- Solo one instrument and learn exactly what it plays.
Key, BPM, chords, structure
- Key and tempo detected on the device in seconds.
- A chord sheet with a capo setting and fingerings.
- A color map of the song — intro, verse, chorus. Tap a part to loop it.
- Lyrics recognized on the device, with chords written above the words.
Practice smarter
- Slow down to 50% without changing pitch, or change the key to match your voice.
- Loop any part, snapped to the beat.
- Metronome with count-in and a built-in tuner.
- Record yourself and compare with the original.
- A practice streak and a home screen widget.
Take it further
- Export MIDI, a chord chart and a project outline for your DAW.
- Folders and setlists, synced through iCloud between your iPhones and iPads.
- Siri Shortcuts: open a song or start practice by voice.
Private by design
Analysis runs on your iPhone, with no uploads and no account. Your recordings never leave your device.
Keymap Pro
Keymap Pro is available as a yearly subscription with a 7-day free trial, a monthly subscription, or a one-time lifetime purchase.
Keymap is made by NTSAUTOSIGA LLC. Questions and ideas: hello@ntsautosiga.com · Support, privacy and terms