Cratekey

Key, BPM and beatgrid for the tracks you already own. Worked out on the device.

Point Cratekey at the audio files on your iPhone or iPad and you get a crate list with the key in Camelot, the BPM, the length and the loudness. Switch between Camelot, Open Key and standard notation. See what mixes next. Export a CSV and a beatgrid.

Nothing is uploaded. There is no account and no server.

What it does not do

• DRM-protected tracks cannot be analyzed. Apple Music and other streaming downloads are protected; Cratekey works on audio files you keep on the device.
• Analysis runs while the app is open. A large crate takes a while — leave Cratekey in the foreground and let it finish.
• It does not write into another DJ application's library. The CSV and beatgrid are files you can read, script against, or feed into a conversion tool.
• Key and BPM detection is not infallible. Fast material often comes back at half speed, and major/minor get swapped sometimes. Both are fixable in one tap, and your corrections are never overwritten.

Get it

Download on the App Store

iPhone / iPad · iOS 27 or later · Free download, one one-time purchase for the full crate.
日本語: App Store でダウンロード（iOS 27 以降・無料ダウンロード・買い切り 1 本）