JamKey: Key & BPM Finder

Detect Song Key & BPM Fast

Only for iPhone

$7.99 · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

JamKey is built for musicians, guitarists, producers, songwriters, and anyone who needs to understand what they’re hearing fast. Whether you are learning a song, practicing over a track, preparing to jam, or trying to find the right scale to solo with confidence, JamKey helps you identify the musical key and BPM of a song in seconds. Record audio through your microphone or upload a file from your device, and JamKey analyzes the track using advanced harmonic detection. In just moments, you can see the song’s key, tempo, and the musical information you need to play with more confidence and less guesswork. ► Instantly detect the key and BPM of any song • Record live with your microphone or upload an audio file • Analyze at least 15 seconds of audio to identify the song’s musical key • Detect BPM so you can quickly understand the tempo of the track • Great for practice, rehearsal, songwriting, covers, and learning songs by ear ► Transpose keys with ease in Basic • Shift the detected key up or down by semitones • Instantly see the new key after transposition • Useful for changing songs to match your vocal range, instrument preference, or practice goals • Quickly explore alternate keys without doing the theory manually ► Understand what to play with Premium insights • Unlock scale recommendations based on the analyzed song • See mode suggestions that help guide your improvisation and lead playing • Discover options like major, minor, and modal approaches that fit the track • Designed to help players move from detection to action ► Visual fretboard guidance for guitar players • View a guitar fretboard that maps out playable notes for the recommended key or scale • Use the visual layout to find notes faster and start playing immediately • Ideal for soloing, noodling, writing leads, or practicing scale shapes in context ► Play for the feeling, not just the theory • JamKey does more than name the scale • Premium guidance also helps describe the feel or mood associated with different scale and mode options • Understand whether a recommendation feels darker, brighter, more resolved, more expressive, or more tense • Helpful for musicians who want to choose notes based on emotion as much as theory ► Save your progress with analysis history • Revisit previous analyses anytime • Keep track of songs you have studied, practiced, or transposed • Build a more useful practice workflow over time What’s included in Basic • Upload audio or record with your microphone • Detect musical key • Detect BPM • Transpose keys by semitone • Access analysis history What’s included in Premium • Scale recommendations • Mode guidance • Guitar fretboard note visualization • Feel-based musical insight for what to play JamKey helps remove the friction between hearing a song and knowing how to play with it. Instead of guessing the key, searching for tempo, or wondering which scale will work, you can get the answers quickly and keep your focus on making music. Subscription Premium is available as a monthly subscription. Payment is charged to your Apple ID at confirmation of purchase. Subscription renews automatically unless canceled at least 24 hours before the end of the current period. You can manage and cancel your subscription anytime in your Apple account settings. Privacy Policy: https://jamkey.app/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Ratings & Reviews

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Improved fretboard note accuracy and scale matching. Added premium feature previews and updated App Store screenshots. General performance improvements and bug fixes.

Version 2.0

The developer, Imperfect Tense Publishing, LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Contact Info
    • User Content
    • Identifiers

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Imperfect Tense Publishing, LLC
Size
  • 26.2 MB
Category
  • Music
Compatibility
Requires iOS 13.4 or later.
  • iPhone
    Requires iOS 13.4 or later.
  • iPod touch
    Requires iOS 13.4 or later.
  • Mac
    Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
  • English
Age Rating
4+
In-App Purchases
Yes
Copyright
  • © 2026 Imperfect Tense Publishing, LLC
  • Developer Website
  • Privacy Policy