Cratekey: DJ Key Finder

Key and BPM for the crate you already own. Point Cratekey at the audio files on your device and you get a crate list with the key in Camelot, the BPM, the length and the loudness. Analysis runs entirely on the device; your audio is never sent to a server. WHAT THE ANALYSIS GIVES YOU • Batch analysis — hand it a folder's worth of files and let it work through them • Camelot, Open Key or standard notation, switched whenever you like • What mixes next — same key, one step around the wheel, and the relative major/minor, kept in separate groups so you can see which is which • Export — CSV for the whole crate, plus a beatgrid file with the anchor, BPM, meter and beat position • Loudness (LUFS) and track structure WHAT IS FREE AND WHAT CRATEKEY PRO ADDS Importing, key and BPM analysis (up to 20 tracks), the ×2 / ÷2 and manual BPM fixes, flipping to the relative key, switching notation, and browsing, sorting and searching the crate are free. Unlimited batch analysis, what-mixes-next suggestions, CSV and beatgrid export, and track structure and loudness are part of Cratekey Pro (one-time purchase). WHEN THE ANALYSIS GETS IT WRONG Key and BPM detection is not infallible, and Cratekey does not pretend otherwise. Drum & bass and other fast material often comes back at half speed — tap ×2. Major/minor (relative key) mix-ups can be corrected by flipping to the relative key; the harmonic matches are then worked out again from the corrected key. Anything you fix by hand is kept, and no re-analysis will overwrite it. WHAT IT DOES NOT DO • DRM-protected tracks — Apple Music and other streaming downloads — cannot be analyzed. Cratekey works on audio files you keep on the device. • Analysis runs while the app is open. A large crate takes a while, so leave Cratekey in the foreground and let it finish. • The CSV and beatgrid are files you can read, script against, or feed into a conversion tool. Cratekey does not write into another DJ application's library. No account. Audio analysis is completed on the device and your audio is not sent to any server (purchases and restores talk to the App Store).