for the iOS app “Stellkurs”
“Stellkurs” is an iOS app that calculates the optimal orientation of a camper or motorhome at a pitch — based on sun position, location, compass direction, and optionally captured obstacles.
The app works without a user account and without a proprietary backend. No user data is transmitted to the provider's own servers.
The app processes only data that is technically required to provide its functions.
If you use the location feature (tap on “My Location”), the app processes your current device location so that:
Location access takes place only in the foreground and only after explicit permission via the iOS permission system.
In live mode, the app uses the magnetometer sensor (compass) of your iPhone to determine the current device orientation. Compass data is used exclusively for real-time display and not stored.
When you search for a place or pick a map point, the app processes the entered search query and the chosen coordinates. For location search and geocoding, the native iOS services (Apple Maps) are used.
When you use the level tool or the AR mode, the app processes accelerometer and gyroscope data from your iPhone to determine the device's tilt and orientation. This data is processed only during active use and is not stored.
When you use the AR mode (“Sun path”), the app processes the live camera stream of your iPhone to display the camper and sun path in augmented reality at the real-world location. Camera data is processed exclusively locally on your device and is not stored, not transmitted, and not analysed — neither images, nor video, nor detected objects leave your device.
The app stores the following data exclusively locally on your device:
| Data | Purpose |
|---|---|
| Most recently used places (max. 5) | Quick access on next launch |
| Saved favorites with optional note | Find pitches again |
| Last app state (location, date, living side, goal, orientation, obstacles) | Automatic restoration on app start |
| Appearance mode (light/dark/system) | Personal setting |
This data is stored via UserDefaults and does not leave your device.
Processing takes place exclusively for the following purposes:
The app uses no proprietary backend. No personal data is transmitted to the provider's servers.
Locally stored data remains exclusively on your device.
When you use map, location, or search functions, the technically required data is processed via the services provided by iOS:
The astronomical sun position calculation takes place locally on your device. For map, search, and geocoding functions, as well as more precise time zone determination when needed, native iOS services by Apple are used.
Recipients are exclusively entities that are technically required to provide the functions used:
Transmission to other third parties for advertising, analysis, or profiling purposes does not take place.
The app:
To the extent that the General Data Protection Regulation (GDPR) applies, processing takes place on the following basis:
Locally stored data remains on your device until:
Location, search, compass, sensor, and camera data is processed only during active use of the respective function and is not permanently stored.
The app may request the following iOS permissions:
| Permission | Use |
|---|---|
| Location (While using) | Map display, location adoption, compass, sun calculation |
| Motion & Fitness | Level tool, AR alignment (accelerometer and gyroscope) |
| Camera | AR mode “Sun path” — live visualization of camper and sun path at your spot |
You can change or revoke permissions at any time in the iOS settings. Without consent, the affected functions are not available or only available to a limited extent.
To the extent that the GDPR applies, you have the following rights:
Since all data is stored locally on your device, you can view it yourself at any time and delete it completely via the app settings.
For privacy questions:
This Privacy Policy is effective as of April 21, 2026.