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Privacy policy

Tune Performance app, version 1.0 — last updated 6 November 2026.

In one sentence

Tune Performance collects no personal data and sends nothing off your device. The app runs entirely offline, asks for no account and contains no advertising and no analytics. Everything you measure, tune or log stays in your phone's memory.

1. Who publishes the app

The Tune Performance app (Android identifier fr.tuneperformance.app for the standard edition, fr.tuneperformance.pro for the Pro edition) is published by the Tune Performance team. For any question about this policy or about your data, write to info@tune-performance.com.

2. Nothing is sent, there is no network access

The app does not declare the Internet permission and contains no network call. No information — measurement, setting, location or recording — is sent to the publisher or to any third party. There is therefore nothing to resell, share or analyse.

3. What the app uses on your phone

  • Microphone — used while detecting knock and while adjusting the carburetor, to listen to the engine and draw its spectrum. Sound is analysed live: no audio file is created, stored or sent. You may deny this permission; the other features stay available.
  • Camera and flash — used by the timing light and the ignition check. The image is a live preview on screen. If you tap record, the video is written to your gallery, in the Movies/TunePerformance folder: that file belongs to you, it stays on your phone and you can delete it at any time. No image or video is ever sent anywhere.
  • Location (GPS) — used only during performance runs, to compute distance, speed and elapsed time (0-100 m, 0-400 m, 0-60 mph, free mode). The calculation happens on the device. No route is recorded, no location history is kept and the position is never transmitted.
  • Notifications — used for the maintenance reminders in your log. Those reminders are scheduled locally by your phone; they go through no server.
  • Local storage — your settings (carburetor, squish, ignition, suspension), your maintenance log and your performance runs are saved in the app's private storage on your device. Neither other apps nor the publisher can read them. Note: if Android's automatic backup is enabled on your phone, it may include the app's data in your Google account backup. That backup is handled by Android and your account, not by the publisher, who has no access to it.

4. What the app does not do

  • No account, no login, no password.
  • No advertising, no tracker, no usage analytics.
  • No resale or sharing of data, since no data is collected.
  • No access to your contacts, messages, calendar or personal files.

5. Retention and deletion

Data saved by the app stays on your phone for as long as you decide. To erase it: use the app's own clearing functions (clear runs in the performance screen, delete a log entry), clear the app's data from Settings → Apps → Tune Performance → Storage → Clear data, or uninstall the app. Uninstalling permanently removes every setting, log entry and run. Videos saved to your gallery are personal files: they are not removed by uninstalling, and you delete them like any other video.

6. Children

The app is a technical tool intended for people who service or tune an engine. It is not aimed at children and collects no data about them in any case.

7. Security

Because no data leaves your device, there is no publisher server that could be read or attacked. The protection of your data therefore rests on your phone: screen lock, system updates, encrypted backup if you use one.

8. Your rights

Data protection rules (GDPR in Europe) govern the processing of personal data. As the publisher processes no personal data about you in the app, there is nothing to disclose, correct or erase: you already have full control, on your device. If you believe some processing is taking place anyway, write to info@tune-performance.com and you will get an answer.

9. This website and its audience measurement

The app sends nothing, but this website (tune-performance.com) counts its visitors. To do so it records, for each visit, the page viewed, the time, the approximate geographic area, the device type and the referring site, as well as the visitor's IP address. This data is used only to see which pages are useful and to spot abnormal access. It is never resold, never shared with third parties, never used for advertising profiles, and is not linked to your identity. The site sets no analytics or advertising cookies. You may ask to see or erase this data by writing to info@tune-performance.com.

10. Changes to this policy

If a future version of the app added a feature requiring data to be sent, this policy would be updated before that version was published and the date above would change. This version describes app 1.0, which works with no data transfer at all.

11. Summary

  • Microphone — live engine noise analysis, never transmitted.
  • Camera and flash — timing light preview and video, kept on your device.
  • GPS — performance run calculations, on the device.
  • Notifications — local maintenance reminders.
  • Settings, log, runs — the app's private storage, never transmitted.
  • Visits to this site — recorded with IP address, no cookie, for audience measurement only.

This policy is also available in French: Politique de confidentialité.