Dual Degree privacy policy.

Summary

Dual Degree asks for as little as possible. No account, no analytics, no advertising, no third-party trackers. The app uses your location to fetch local weather, and those coordinates are sent to Apple WeatherKit and Open-Meteo — never to anyone else, and never tied to your identity. If you turn on lightning alerts, the app additionally registers your saved cities and a push token with our server so it can notify you.

What we don't collect

• No account, no sign-in, no email or name.
• No advertising identifier, device fingerprint, or contact list.
• No analytics SDKs, no third-party trackers.
• We do not sell, rent, or share data with anyone.

Location

When you grant location permission, the app uses your coordinates to fetch the current weather and forecast for that point. Coordinates are also sent for any city you save. The app forwards coordinates to:

• Apple WeatherKit — subject to Apple's WeatherKit privacy notice.
• Open-Meteo — used for air quality and as a backup forecast source. Their terms and privacy apply.

The app calls Open-Meteo directly from your device, so Open-Meteo receives the request coordinates and your IP address. Open-Meteo uses no cookies and no trackers; per their terms, server logs (which can include IP addresses and coordinates) are kept only for technical and anti-abuse reasons and are deleted after 90 days.

If Open-Meteo is unreachable, the app falls back to our server at api.dualdegree.app, which proxies the same request and caches responses by rounded coordinate (about 1 km of precision). We do not log who made a request; cached entries hold only the rounded coordinate and the weather data, retained for at most 12 hours. City search also goes through our server, which looks up matching places and caches the results by query text, never by who asked.

Background location (opt-in)

If you turn on Background Location in the app's settings, iOS will let the widget refresh your current-location forecast as you move between places. iOS asks your permission separately for "Always" access. You can revoke this at any time in Settings → Privacy & Security → Location Services → Dual Degree.

Lightning data and alerts

The lightning card asks our server at api.dualdegree.app for recent strikes near the city you're viewing. The request carries that city's coordinates and is not tied to your identity.

If you turn on Lightning Alerts, the app registers an Apple push notification token with our server, together with the coordinates and names of your saved cities and your chosen alert distance, so the server can send a notification when a strike lands nearby. Turning alerts off deletes those subscriptions from the server. Push delivery itself goes through the Apple Push Notification service.

Data stored on your device

Your saved cities, preferred temperature scale, units, language, and display preferences are stored on your device using iOS UserDefaults. They are shared with the Dual Degree widget through an iOS App Group so the widget can render the same data. Aside from the weather, search, and lightning requests described above, nothing leaves your device.

Children

The app is suitable for all ages. We do not knowingly collect any personal information from anyone, including children.

Changes to this policy

If this policy changes in a meaningful way, we'll update this page and the "Last updated" date above. The app will continue to behave as described unless and until that happens.

Contact

Questions about this policy or how the app handles data? Email support@motomatic.com.