The service

TrackScope is an iOS application that analyses local audio files on the device.
The app is distributed through the App Store. There is no website service, account or backend.

Free and Pro

Free includes three full welcome analyses, then one analysis per calendar week, and a library of up to three tracks, without JSON export and without creating or editing lyrics and notes. Weekly analyses do not accumulate.
TrackScope Pro adds unlimited analyses, an unlimited library, JSON export of the analysis results, and creating and editing lyrics with line timings and notes with optional timestamps.
Monthly and yearly subscriptions renew automatically until cancelled. Cancelling stops the next renewal; Pro stays active until the end of the period already paid.
Lifetime is a non-consumable one-time purchase without renewal. All three products unlock the same Pro features.
If Pro ends, saved lyrics and notes are not deleted: they can still be viewed and deleted. Adding or editing them requires Pro.
There is no free trial of Pro. The Free plan is not a subscription trial.
Purchases, billing, renewal, cancellation and restoration are handled by Apple.

TrackScope reports what its analysis finds. It does not guarantee that a result is an infallible measurement.

License agreement: