Privacy Policy — T-Driver App

1. Controller

TADMIN GmbH, Marker Dorfstraße 78, 59071 Hamm, Germany.

Phone: +49 2381 9997960 · Email: kontakt@tadmin.de

2. Principles of data processing

T-Driver is designed as a purely on-device application. Personal data, in particular driver card data, is processed exclusively locally on your device and, as a matter of principle, never leaves it. There is no user account in the app, no cloud backup, no central tracking and no transfer of personal data to us or third parties.

3. Data processed and purposes

3.1 Local processing (on-device)

• Reading driver card data via the card reader.
• Local evaluation of working time, driving/rest times, overtime, etc.
• Permanent local storage of the evaluated working-time data in an encrypted database on your device (Android Keystore, AES-256).

This storage is strictly necessary in order to provide the requested service (§ 25 Abs. 2 Nr. 2 TDDDG). The data does not leave your device.

3.2 Technical data

App version, operating system version, device type, language setting — for technical functionality and improvement.

3.3 Voluntary data donation (opt-in)

You may voluntarily donate anonymised data to help improve the app. Both tiers are entirely voluntary, can be activated independently, are off by default and can be revoked at any time.

Tier A – Technical telemetry: anonymised crash reports, app/OS version, device type, aggregated usage statistics; no driver card data, names, locations or times. Legal basis Art. 6 Abs. 1 lit. a DSGVO + § 25 TDDDG. Retention max. 12 months.

Tier B – Improvement of the calculation engine: only heavily aggregated, on-device anonymised metrics; no raw card data, names, card numbers, exact timestamps or position sequences. Legal basis Art. 6 Abs. 1 lit. a DSGVO. Retention max. 24 months.

Anonymisation takes place entirely on your device before any data leaves it. Transmitted data is processed on our own EU servers.

3.4 Web account and purchase (website)

To purchase the premium upgrade we use the payment service provider PayPal; payment is processed by PayPal in accordance with its own privacy policy. If you optionally create a web account (email, password), we store your email and purchase history/licences on our EU servers (Supabase) so that you can retrieve your activation codes again. Legal basis: performance of a contract (Art. 6 Abs. 1 lit. b DSGVO).

4. Legal bases

• Performance of a contract/pre-contractual measures (Art. 6 Abs. 1 lit. b DSGVO)
• Consent for the optional data donation (Art. 6 Abs. 1 lit. a DSGVO)
• Technically necessary storage (§ 25 TDDDG)

5. Retention period

• Local app data: until you delete it yourself (“Delete all data”).
• Donated data: Tier A max. 12 months, Tier B max. 24 months.
• Account/purchase data: until the account is deleted or after commercial/tax retention periods.

6. Your rights (DSGVO)

Access, rectification, erasure, restriction, withdrawal of consent (with effect for the future), objection, data portability. You can delete local app data directly in the app. Further requests: kontakt@tadmin.de. Right to lodge a complaint with a supervisory authority (e.g. the LDI North Rhine-Westphalia).

7. Recipients

As a matter of principle, no disclosure. Where the data donation is active, only anonymised/aggregated data is sent to our own EU servers; PayPal for payments. No transfer to third countries for our own purposes.

8. No automated decision-making

No profiling within the meaning of Art. 22 DSGVO takes place.

9. Changes

You will always find the current version on this page.

10. Contact

TADMIN GmbH, Marker Dorfstraße 78, 59071 Hamm, Email: kontakt@tadmin.de