Mastering Chain

Privacy

Mastering Chain collects no data at all. Not a little, not anonymised — nothing.

In short

No uploads · no accounts · no analytics · no tracking

Your music stays on your iPhone

The tracks you import, your settings and the files you export are kept on your iPhone, in the app's own storage. All processing runs on the device; nothing is uploaded to us or anyone else.

No accounts, analytics or tracking

There is no sign-in, no analytics, no advertising and no tracking. The app does not talk to our servers at all.

Purchases

The free trial and the unlock go through Apple and the App Store. We never see your payment details; Apple only tells the app whether the trial or the unlock is active.

If you write to us

Messages you send to hello@lauthammer.com are used only to answer you, and deleted when they are no longer needed.

Changes

If this ever changes, this page changes first, and the App Store privacy label with it. Last updated 25 October 2026.