Studio51 Song Analysis is an iOS app that analyzes your own mixes entirely on the iPhone. Import wav, m4a or mp3 and it reports tempo, key, LUFS loudness and brightness, plus percentiles against a features-only year-end index so you can see where your mix sits. Genre chips keep a rock mix from being compared to pop or rap. The audio never leaves the device: no uploads, no accounts. One-time $9.99 purchase, no subscription.
Maker here. I record original rock with my band and got tired of “hit predictor” apps. Studio51 Song Analysis reads your file on the iPhone (wav / m4a / mp3), never uploads the audio, and shows tempo, key, LUFS, brightness, plus percentiles against a features-only year-end index. Genre chips so a rock mix isn’t compared to pop and rap. $9.99 once. Happy to walk through a report.
https://apps.apple.com/us/app/st...