Privacy Policy

Helping improve the weather model (optional)

One switch in the app — Help improve the weather model, on the Forecast Accuracy card — controls whether your generation is used to improve forecasts. It is off by default and is turned on when you join Solar Wars in the app (which also switches on actual-generation logging, as sharing needs it), or when you accept the one-time invite on the History screen.

While it is on, the app shares:

• the date, the forecast kWh and the actual kWh you logged, and your panel peak / best-day reference;
• your location rounded on your device to a 0.1° grid (about 11 km) before it is sent;
• which weather provider, model and app version made the forecast, time-stamped forecast snapshots, and how much the forecast changed during the day.

These records are keyed by a random device identifier created by the app — no account, name or email. This is the only data the weather model learns from: Solar Wars data is never used for it, so your days are counted once even if you also play.

Switching it off — on the Forecast Accuracy card, at any time — stops sharing and deletes these records from our servers straight away. Solar Wars keeps working. We rely on your consent for this use, and you can withdraw it at any time.

Solar Wars (optional)

Solar Wars is an optional county leaderboard. Joining requires Sign in with Apple, and joining in the app also turns on weather-model sharing, which helps improve Sun Hours; you can turn that off at any time without leaving Solar Wars. Your Solar Wars data itself is used only to run the game.

We store:

• the identifier Apple provides for this app — not your name or email address;
• the username, county (UK) or country, avatar and profile visibility you choose;
• each completed day's forecast kWh, your panel peak and, if you log it, your actual kWh (logged in the app), which confirms the day's score. No location is stored.

What other players see: only what you choose to share — your username and your county or country, plus your XP and trophies if you make your profile public. Your generation readings are never shown individually.

Deleting your account (in the app, or the Me tab at sunhours.app/solarwars) permanently removes your profile and every synced day, and signs you out. It does not turn off weather-model sharing or delete that data — turn it off on the Forecast Accuracy card to do that. To also remove Sun Hours from your Apple Account, go to Settings → your name → Sign in with Apple on your iPhone.

Data Retention

• Shared daily records (weather-model sharing and Solar Wars days) are deleted automatically 3 years after the day they describe, or sooner when you switch sharing off or delete your Solar Wars account.
• Solar Wars profiles are kept until you delete them.
• Statistical summaries. We retain closed-month statistical summaries permanently to study seasonal and geographic performance. Each retained group requires at least 10 contributing device identifiers and 50 device-days; these summaries contain no device identifiers, individual readings or precise locations. They remain after individual records are deleted. Coarse regional results are suppressed where contributor thresholds are not met.
• Backups. Nightly backups are kept for up to 90 days, so deleted records leave them within that time. Backups are stored with Cloudflare in Eastern North America; everything else is held in Cloudflare's global network.
• Uninstalling the app does not delete server data by itself — switch sharing off or delete your Solar Wars account first.