Key and tempo detection for musicians

Stop Guessing. Start Playing.

JamKey is a simple utility app for finding the key and tempo of audio. Record a clip or upload a track, get the musical info you need, and keep playing.

Download on the App Store
See how it works
Record or upload audio
Detect key and BPM
Translate it into theory context

ANALYZE THE TRACK
GET YOUR KEY & BPM
START JAMMING

JamKey app screen showing the real in-app key and tempo interface

Actual JamKey app screen

KeyFind the tonal center fast
BPMLock into tempo without hunting
ModeUnderstand the musical color
ShiftSee where transposition lands
Built for working musicians

Practical tools for quick music decisions.

JamKey helps with the everyday moments musicians run into: checking a song key, finding BPM, understanding mode, and testing a transpose before rehearsal or practice.

01

Fast musical facts

Detect key and tempo from a file or recording so the session does not stall while everyone guesses.

02

Useful theory details

See scale, mode, confidence, and transposition info when you need a little more context.

03

History for real work

Keep recent analyses available for set lists, covers, writing sessions, and practice loops.

How does it work?

From audio to answer in three moves.

JamKey is built to be fast: open the app, add audio, read the result, and move on.

1

Record or upload.

Capture audio through the mic or bring in a song, loop, rehearsal take, or reference track.

2

Read the result.

Get key, BPM, confidence, and theory context in a clean results screen.

3

Transpose if needed.

Shift by semitone, check the new key, and use the result in rehearsal, writing, or arrangement work.

Theory details, when useful.

A MinorDetected key
AeolianMode context
+2 semitonesB Minor
96 BPMTempo readout

Why it matters

Made for practice, rehearsal, and songwriting.

Use JamKey when you need to identify a reference track, confirm the tempo of a loop, transpose a part, or save an analysis for later.

Get JamKeyContact

Premium tier

Know what to play, not just what key you are in.

Premium adds scale recommendations, emotional tone matching, a guitar fretboard view, and feel-based improvisation guidance for musicians who want the next move.

Explore PremiumUnlock in the app

Suggested scalesSee the best scales and modes for the track.
Emotional toneMatch the sound by feel, mood, and color.
Guitar fretboardTranslate the result into playable positions.
Improv guidanceGet direction for what to play over the song.

Quick answers for working musicians

Find the key. Match the tempo. Keep going.

Download JamKey for iPhone and get key, BPM, and theory context without slowing down your session.

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