Knurrix Privacy Policy

Last updated: 6 August 2026

In brief: Your training data — tracks, GPS points, dogs, photos and notes — is created on your device and remains available there without an account. A Knurrix account is optional. If you connect an account, we additionally back up your app data on our server in Germany. We do not sell data. If a feature you choose requires an external provider, we state this explicitly below.

Controller

Knurrix account and backup

An account is optional. Without an account, the app remains fully functional and all data stays on that phone. You can sign in with Google (and, during testing, through the test-server login). We then process your Google identifier, email address and display name.

Once an account is connected, we mirror all your app data to our server in Germany (Hetzner, Falkenstein): your profile, dogs, tracks with exact GPS traces, track work, settings, and chats and groups if you use them. During a recording, the intermediate state is backed up roughly once a minute so that nothing is lost if the app crashes. Your tracks are visible there only to you unless you explicitly share an individual track.

We do not disclose your data to third parties. If you delete your account in the app, we remove all associated data from our server; everything on your phone remains there.

Read-only web view

At konto.knurrix.com, you can sign in with the same Google account and view profile, dog, health, training and track data that has already been mirrored. The web view is deliberately read-only: recordings, maintenance and changes are made only in the offline-capable app on your device.

For sign-in, Google verifies your identity and sends us a Google identifier, your email address and display name. We then use a technically necessary signed session cookie. It is not used for advertising or usage analytics and contains no password. The session ends when you sign out or automatically after seven days.

For large track maps, the web view loads Google Maps. For technical reasons, this transmits your IP address and the displayed map sections to Google.

Location data

We collect your location to record and work your tracks and to display maps. Background location is collected only while a recording is active, and a recording can be started and ended only by you. Without an account, this data remains on the device; with a connected account, it is backed up as described above.

Location transmission every minute

Only if you expressly consented when connecting your account does the app transmit your exact position to our server approximately once a minute while the app is OPEN. The purpose is internal improvement of the app. Without your consent, this does not take place, and it never takes place in the background or while the app is closed. Legal basis: Art. 6(1)(a) GDPR (consent).

You can withdraw your consent by disconnecting your Knurrix account in the settings. This takes effect immediately: no further ping is created, and any positions not yet sent are discarded. Positions already transmitted are stored permanently. They carry their own random identifier, which is unrelated to the usage-statistics identifier.

If you use the app without an account, the same applies only if you accepted the notice “By starting, you accept our Privacy Policy” when first launching the app. While the app is open, it then transmits your position about once a minute with a random device identifier — without a name, email address or account. These positions are never linked to an account, even if you sign in at a later date. Legal basis: Art. 6(1)(a) GDPR (consent).

Photos

The camera or photo library opens only when you initiate it. Photos are stored locally on your device.

Online services

When you use the following services, your IP address and, in some cases, coordinates are transmitted for technical reasons:

• Map tiles: CARTO, Esri — to display maps.
• Place names and place search: OpenStreetMap/Nominatim — coordinates are sent for reverse geocoding when a track is completed or when you tap the relevant control.
• Weather: Open-Meteo — coordinates are used for local weather data.
• App updates: Expo/EAS — technical device information.

Legal basis: Art. 6(1)(b) and (f) GDPR (provision of the functions / legitimate interest in a functional app).

Permissions at a glance

• Location: To record your tracks.
• Camera and photos: For profile, dog and terrain photos.
• Notifications: To remind you of the ageing time.
• Vibration: For alerts while working a track.

Beta request through the website

You can register your interest in the beta phase at knurrix.com. You provide us with your name, WhatsApp telephone number, the invitation address of your Google or Apple account and, if you choose to provide them, your sport and a message. We store this information on our server in Germany (Hetzner, Falkenstein) and use it solely to select beta participants and contact you.

The legal basis is the consent you give when submitting the form (Art. 6(1)(a) GDPR); we record the time of that consent. You may withdraw it informally at any time by emailing support@knurrix.com. We will then delete your request.

A beta request does not constitute consent to advertising. We will send you only messages relating to the beta.

For the Android field test, we need the Gmail address you use in the Google Play Store. If it is missing, we will ask you for it by email. Your reply is associated with your beta request in our internal support system. We store the Gmail address and the times at which it was recorded, manually added to the Play tester list and sent the test link.

If you separately consent to contact via WhatsApp, we use your number to coordinate the field test with you personally. In doing so, your telephone number, communications and technical metadata are processed by WhatsApp Ireland Limited and/or affiliated Meta companies. The form data itself remains on our infrastructure. You can withdraw your WhatsApp consent at any time with effect for the future.

We transmit the invitation address to Google Play or Apple TestFlight only if you are actually invited. It is not used for advertising.

To prevent abuse of the form, we briefly count how many requests come from the same IP address. We discard that address after a short period; it is not stored with your request.

We delete your request no later than the end of the beta phase unless it has resulted in a Knurrix account.

Optional website analytics

On the public website knurrix.com, we only use our self-hosted reach analytics with your explicit consent. We process the pages you visit, the time and duration of your visit, scroll depth, buttons clicked, broad device and browser categories, language, referring page and any voluntary UTM campaign parameters.

Once you have consented, we create a random visitor identifier and a separate random identifier for each browser session. These are not linked to a Knurrix account, name, email address, dog, health, training or GPS data. To provide a broad indication of origin, your IP address is used on our server only during the request to determine a region. We store only the country, region and a coarsely rounded regional centre point, never the IP address or a precise location.

The data is processed exclusively on our own infrastructure in Germany and is not transferred to Google Analytics or any other analytics service. We delete raw events after no more than 90 days. Aggregated daily figures that can no longer be associated with individual sessions may be retained for longer.

The legal basis is your consent under Art. 6(1)(a) GDPR. No website analytics takes place without your consent. Your choice is stored in your browser as a technically necessary setting. You can withdraw your consent at any time with effect for the future via “Analytics settings” in the website footer. This also deletes the random analytics identifiers from your browser.

Storage periods and deletion

Data remains on your device until you delete it in the app or uninstall the app; uninstalling removes all local data. We store data on our server for as long as your account exists — tracking work is long-term work. “Delete account” in the app removes all server data; everything on the phone remains there.

Anonymous usage statistics

To understand whether the app is reliable and when it is used, it sends us anonymous usage events: app opened and closed (including duration), a heartbeat every minute while it is open, and “a track was laid” or “a track was worked” — in each case only with the time, app version and device type. This includes a randomly generated device identifier so that we can count devices; it contains no name, email address or advertising identifier.

The usage statistics do not contain locations, tracks, photos, notes or dog data. Location transmission (see above) uses a separate random identifier; the two datasets cannot be linked. Legal basis: Art. 6(1)(f) GDPR (legitimate interest in a functional, continuously improved app).

No advertising and no sale of data

We use no advertising trackers, do not disclose analytics data and do not sell data. Optional website analytics is operated exclusively by us.

Your rights

You have the right of access, rectification, erasure, restriction, objection and data portability in relation to your data. To exercise these rights, contact support@knurrix.com.

You also have the right to lodge a complaint with a data protection supervisory authority. For Berlin, this is the Berlin Commissioner for Data Protection and Freedom of Information.