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Privacy Policy
Last updated: 23 September 2026
The short version
Zill has no accounts, no analytics, no advertising and no tracking. We, the developer, receive no data about you at all. Your places, parking spots, car details and camera scenes stay on your phone.
Location
Zill uses your location on your device to compute the sun's position, true north and the shade where you park. To show live weather, maps and the buildings around a saved place, the app sends the coordinates of that place, and nothing that identifies you, directly to these services, which answer the request in real time:
- Open-Meteo (open-meteo.com) for the weather forecast, clouds, UV and sunshine.
- OpenStreetMap Overpass servers for building, tree and wall outlines around a saved place.
- Mapzen Terrain Tiles on Amazon Web Services for the height of hills on the horizon (map tiles, not your exact position).
- Apple Maps for maps, place search, place names and satellite images.
You can use Zill without location: pick any place on the map instead.
Camera and motion
The camera (Shadow Lens and AR Sky) and the motion sensors (3D, VR, Sun Meter and Window Sun) are processed on your device only. Nothing is recorded or uploaded. A photo or video is saved to your library only when you tap Save.
What stays on your device
Saved places, parking settings, your car profile, Shadow Lens scenes, the Sun Diary, quiz streaks, badges and settings are stored only in the app on your device. Deleting the app deletes all of it.
Notifications
Sun alerts, UV reminders and monthly feature alerts are local notifications scheduled on your phone. No push service is used.
Purchases
The one-time Zill Pro purchase is processed entirely by Apple through the App Store. We receive no payment details and no identity information.
Children
Zill is suitable for all ages and collects no information from anyone.
Changes
If this policy changes, the new version will be posted on this page with a new date.