Privacy policy of the “Parzello” app
Last updated: 6 October 2026 · applies to the Android app Parzello (de.christiankempf.parzello). The website is covered by the general privacy policy. In case of doubt the German version prevails.
In short: Parzello stores your plots, plants, plans, notes and photos only on your device. From the internet the app only loads map tiles and aerial photos from public authorities. There is no account, no server and no advertising.
1. Controller
Christian KempfBreitenweg 2, 72406 Bisingen, Germany
E-mail: christian.firmdev@gmail.com
2. Everything stays on your device
Parzello has no user account and sends no data to me. Whatever you create in the app is stored exclusively in the app’s database and storage on your device:
- Plots and plants: outlines, land use, positions of plants and trees, varieties, status.
- Crop plans and crop database: plan entries, bed layouts, your own and adjusted crops.
- Journal: notes, harvests, tasks, observations and photos. Photos you take or choose are copied into the app’s own storage.
- Reminders and NFC links: dates and the assignment of tag IDs to plots.
- Downloaded maps: map tiles and aerial photos for offline use.
3. Connections the app makes
For the map and aerial photo the app requests tiles or image sections from the following public bodies. Transmitted are the requested map section (coordinates and zoom level) and, for technical reasons, your IP address and the usual connection details – no identifier, no account, no information about your plots.
- Base map: TopPlusOpen of the Federal Agency for Cartography and Geodesy (BKG), Frankfurt am Main, Germany.
- Aerial photos and parcels Baden-Württemberg: State Office for Geoinformation and Land Development Baden-Württemberg (LGL), Stuttgart.
- Aerial photos and parcels North Rhine-Westphalia: Geobasis NRW, District Government Cologne.
- Aerial photos and parcels Bavaria: State Office for Digitisation, Broadband and Surveying (LDBV), Munich.
Which layers are loaded is up to your selection in the map. Areas already downloaded are shown without a new request. The legal basis is Art. 6(1)(b) GDPR, as the map cannot be displayed without these requests. What these bodies do with the connection data is governed by their privacy policies.
4. Location
Parzello only requests your phone’s location when you ask for it yourself – for example to place a plant at your current position or to move the map there. Android asks for your consent the first time. There is no background location, and the location only leaves the device as a map section when tiles are loaded (see 3).
5. Voice input
For voice input Parzello starts Android’s speech recognition (usually provided by Google). The app itself records nothing and has no access to the microphone; it only receives the recognised text. Depending on device and settings, recognition happens on the device or at the service provider, whose privacy policy then applies.
6. Permissions
| Internet | Loading map tiles and aerial photos (see 3) |
|---|---|
| Location (when needed) | Only when you tap, never in the background (see 4) |
| NFC (optional) | Reading a tag’s ID and writing a parzello:// link so that touching the tag opens the right plot |
| Notifications | Reminders scheduled on the device; there is no push service |
| Run at startup, vibration | So that scheduled reminders survive a restart and can be felt |
Not requested: camera, microphone, contacts, storage and background location. You take photos with the camera app or pick them via Android’s photo picker; the app only sees the one picture you choose.
7. Google Play
Download of the app and any purchases are handled by Google Play (Google Ireland Ltd., Gordon House, Barrow Street, Dublin 4, Ireland). I receive no payment data; Google only provides the information needed for accounting (e.g. order number, country, amount) and aggregated Play Console statistics. Legal basis: Art. 6(1)(b) GDPR. Google’s privacy policy also applies.
8. No advertising, no analytics
Parzello contains no advertising, no analytics tools, no trackers and no crash reporting. The advertising ID is not read.
9. Export and backup
You can export crop plans as a CSV file and all data as a backup file. Where you save the file or whom you send it to is up to you, via Android’s share function.
10. Retention and deletion
Data stays on your device until you delete it in the app or uninstall the app. Android may include app data in your personal device backup (e.g. in your Google account) if you have enabled this in the system settings.
11. Your rights
As I receive no data from the app, I cannot provide information about it or delete it; you have full control on your device. For questions, contact me at the address above. You may also lodge a complaint with a data protection supervisory authority, for example the one responsible for me: the State Commissioner for Data Protection and Freedom of Information Baden-Württemberg, Lautenschlagerstraße 20, 70173 Stuttgart, Germany.