Last updated September 14, 2026

Mix Delta privacy policy

Mix Delta processes sound on your iPhone. ThumpStack Labs™ receives none of the app’s microphone audio or saved measurements.

Microphone audio

Microphone access is used only for captures you start. Audio is held temporarily in memory for local analysis. Mix Delta does not save audio recordings or transmit audio. Leaving the app cancels an active capture.

Local history

The app saves numeric frequency-band measurements, capture times, microphone setup information, and your display threshold on your device. These support comparisons with your soundcheck. App history is excluded from device backups. Starting a new soundcheck permanently clears the current show’s saved measurements; deleting the app removes its local data.

No app collection or tracking

Mix Delta has no accounts, analytics, advertising, tracking, or network services. It does not upload your audio, measurements, or microphone setup information. Apple handles App Store purchases under Apple’s privacy policy.

Your choices

You can cancel a capture or revoke microphone permission in iPhone Settings. The app cannot capture sound without permission. A capture that cannot be saved may remain in memory until you retry saving, discard it, or close the app.

Support and this website

If you email support, you choose what information to send. Your message is used to respond to your request. Avoid sending recordings or sensitive information. This website is separate from the iPhone app: its hosting provider processes web requests to deliver these pages. The pages contain no added advertising, analytics scripts, or forms.

Contact

For help or a privacy question, email scott@thumpstacklabs.com.