Privacy policy

Last updated: 11 November 2026 · covers the app "BoltMeter" (German "Zählerblitz") and this website. This is a translation; the German version is authoritative.

In short

The app needs no account, shows no ads and contains no analytics or tracking services.
Your PIN and settings stay on your phone. They are not sent to me or anyone else and are excluded from backups.
This website sets no cookies and loads nothing from third parties. The web host keeps technically necessary server logs.

1. Controller

The controller within the meaning of the General Data Protection Regulation (GDPR) is:

Harry Werkmeister
Postal address: see the legal notice (Impressum)
Email: info@zähler-blitz.de

2. The BoltMeter app

2.1 The app collects nothing

The app does not collect personal data and does not transmit any data to me or to third parties. There is no user account, no advertising, no analytics or statistics service and no crash reporting of my own.

2.2 Data stored only on your device

To work, the app stores the following in its private storage on your phone:

your settings, e.g. language, theme, signal settings and customised templates,
the meters you create, with name, template and menu positions,
your meter's PIN, but only if you turn on "Remember PIN on this device" or save the PIN with a meter.

Only the app can access this storage. The data is excluded from Android cloud backup and from transfers to a new device. It never leaves your phone, and I have no access to it.

You can delete the data at any time: single meters in the app, everything via "Clear app data" in the Android settings, or by uninstalling the app.

2.3 Permissions

Flashlight: the app turns the LED next to the camera on and off through Android's flashlight function. This needs no camera permission. The app takes no photos or videos.
No internet access: the app has no permission for internet or network access, so it cannot send or receive any data over the network at all.

2.4 Download via Google Play

The app is distributed through Google Play. When you download or update it, Google processes data such as your Google account, device information and installation data under its own responsibility. The provider is Google Ireland Limited, Gordon House, Barrow Street, Dublin 4, Ireland. See Google's privacy policy.

In the Google Play Console, Google gives me aggregated statistics such as install numbers, ratings and crash reports, the latter only if you have allowed your device to send diagnostic data to Google. This information does not let me identify you personally.

3. This website

3.1 Hosting and server log files

This website is hosted by ALL-INKL.COM – Neue Medien Münnich, owner René Münnich, Hauptstraße 68, 02742 Friedersdorf, Germany. A data processing agreement under Art. 28 GDPR is in place with the host.

When you visit the website, the server automatically stores information your browser sends: IP address, date and time of the request, page requested, referrer URL, browser type and operating system, HTTP status code and amount of data transferred. This data is used to run the website securely and reliably and to find errors. The legal basis is Art. 6(1)(f) GDPR; my legitimate interest is the technically sound and secure operation of the website. Log files are deleted after 7 days.

3.2 No cookies, no tracking, no third-party content

This website sets no cookies, uses no analytics or tracking services and embeds no external content such as fonts, scripts, videos or maps. Fonts come from your own device. Links to Google Play only take you to Google when you click them.

3.3 Contact by email

If you email me, I process your email address and the content of your message to answer your request. The legal basis is Art. 6(1)(f) GDPR; my legitimate interest is answering your request. I delete the message once the request is settled, unless legal retention obligations apply.

4. Your rights

You have the right of access (Art. 15 GDPR), rectification (Art. 16), erasure (Art. 17), restriction of processing (Art. 18), data portability (Art. 20) and to object to processing (Art. 21). Just write to the email address above.

You can also lodge a complaint with a data protection supervisory authority (Art. 77 GDPR), for example the one in your country or German federal state.

5. Changes

I update this privacy policy when the app or website changes, for example when the tip feature is switched on. The version published here applies.