Privacy Policy

This is a translation of the German original. In case of doubt, the German version prevails.

1. Controller

Tegrovio, Dominik Palzer
Sterntalerweg 65
40235 Düsseldorf, Germany
E-mail: hello@brewmind.app

2. The short version

The BrewMind app requires no account, no e-mail address and no password. Everything you record stays on your device. There is no cloud, no synchronisation and no server that receives your brew data. As the operator, I never see your shots.

Personal data is therefore processed in two places only: when you visit this website (section 6) and when you write to me or join the beta (sections 4 and 5).

3. Data inside the app

Everything you create in the app lives in an SQLite database inside the app's protected storage area on your iPhone:

• Beans, machines, grinders and the paired scale
• Shots with dose, grind setting, yield, times, temperature, ratio and flow values
• Scale measurements taken during a shot (weight and flow over time)
• Your taste verdict for a shot
• App settings

This data does not leave the device on its own. You can copy a single shot or your current history selection to the clipboard as JSON and pass it on yourself. Where it goes is your call.

There is no advertising identifier (IDFA), no ad tracking, no third-party analytics, no third-party crash reporting, no location access, and no access to contacts, camera or photos.

Deletion: Individual shots can be deleted in the app. Uninstalling the app makes iOS remove the database and everything in it. Since nothing is stored beyond your device, there is nothing on my side left to delete.

Bluetooth (BLE)

Connecting a coffee scale is optional; without a scale the app records the shot as a timer. Bluetooth communication happens locally between your iPhone and the scale only. iOS asks for the “Bluetooth” permission for this. No data is forwarded to the internet over Bluetooth.

4. Beta participation (TestFlight)

The app is currently distributed as a beta via TestFlight, a service of Apple Inc. / Apple Distribution International Ltd., Hollyhill Industrial Estate, Hollyhill, Cork, Ireland. Participation works through a public TestFlight link. You sign up with Apple directly; I do not transmit any of your data to Apple and do not receive your e-mail address.

Apple provides me with aggregated figures on installations, sessions and crashes of the beta build. That analysis is performed by Apple; it gives neither Apple nor me access to the contents of your app database.

Legal basis: Art. 6(1)(b) GDPR (performing the test relationship at your request). For details on Apple's processing see apple.com/legal/privacy.

5. Contact by e-mail

If you write to hello@brewmind.app, for example to sign up for the beta, I process your e-mail address and the content of your message in order to reply. Your message is stored with my e-mail provider. I delete the correspondence once it is no longer needed and no statutory retention period applies.

Legal basis: Art. 6(1)(b) GDPR where beta participation is concerned, otherwise Art. 6(1)(f) GDPR (legitimate interest in answering enquiries).

6. This website

Hosting

This website is served via GitHub Pages (GitHub Inc., 88 Colin P Kelly Jr St, San Francisco, CA 94107, USA, a Microsoft company). When you open the site, your browser transmits technically necessary data that GitHub processes in server log files:

• IP address of the requesting device
• Date and time of the request
• Address of the requested page (URL)
• Referrer URL (previously visited page)
• Browser and operating system used

The legal basis is Art. 6(1)(f) GDPR; the legitimate interest lies in delivering the site reliably and securely. GitHub Inc. is certified under the EU-US Data Privacy Framework. See GitHub's privacy statement for details.

No cookies, no tracking

This website sets no cookies, embeds no analytics or marketing tools and contains no forms. The beta contact is a plain e-mail link that opens your mail client.

Fonts

All fonts used (Inter, Calistoga, JetBrains Mono) are served from this server. There is no connection to external font servers such as Google Fonts.

External links

This website links to external sites (e.g. GitHub). The respective provider is responsible for data processing on those sites.

Encryption

This website is served over a TLS-encrypted connection, recognisable by the “https://” in the address bar.

7. Your rights

You have the right at any time to:

• request information about your stored personal data (Art. 15 GDPR)
• request rectification of inaccurate data (Art. 16 GDPR)
• request erasure of your data (Art. 17 GDPR)
• request restriction of processing (Art. 18 GDPR)
• request data portability (Art. 20 GDPR)
• object to processing (Art. 21 GDPR)
• lodge a complaint with a supervisory authority (Art. 77 GDPR)

To exercise these rights, contact hello@brewmind.app. The competent supervisory authority is the State Commissioner for Data Protection and Freedom of Information of North Rhine-Westphalia (www.ldi.nrw.de).

8. Changes

If the app later gains a feature that lets data leave the device, this policy will be updated before it ships. Such a feature would not arrive quietly: it would be visible in the app and would have its own section here.

Last updated: August 2026