Privacy Policy
Last updated: 17 June 2026
BatteryPilot (“the app”, “we”) is designed to collect as little personal data as possible. This policy explains what we collect, why, and your choices.
Who we are
BatteryPilot is operated by Gijs Broekstra, the Netherlands.
Contact: gijsbroekstra@icloud.com
What we collect and why
| Data | When | Why | Stored where |
|---|---|---|---|
| Apple ID identifier (an opaque user ID) | When you sign in with Apple | To link your account and your ranking entry | Apple Keychain on your device; CloudKit |
| Your name | When you sign in with Apple (you can edit/hide it) | Shown on the public leaderboard | Device Keychain; CloudKit public database |
| Email address (often a private relay address) | If you share it at sign-in | Account identification only — never shared or emailed | Device Keychain; not sent to our servers |
| Battery Score & chosen display name | When ranking is enabled | To show your position on the leaderboard | CloudKit public database |
| Subscription status | When you subscribe (Apple or web) | To unlock premium features | Apple; our backend (web purchases) |
Stays on your device
Battery level, charging state, Low Power Mode, thermal state and the on-device history used for predictions never leave your device. Per-app “consumers” and AI insights are on-device estimates — iOS does not expose exact per-app data.
What we do NOT do
- We do not track you across other apps or websites.
- We do not sell or rent your data.
- We do not run third-party analytics.
The public leaderboard
If you sign in and use ranking, your display name and Battery Score are visible to other users via Apple’s CloudKit public database. You can avoid this by using the app without signing in (“Continue without an account”) — your ranking then stays a local estimate.
Third parties
- Apple — Sign in with Apple, iCloud/CloudKit, and In-App Purchases are handled under Apple’s Privacy Policy.
- Stripe — if you subscribe on the web, payment is processed by Stripe under Stripe’s Privacy Policy. We never see your card details.
- Google AdMob (only if/when ads are enabled) — free users may see ads served by AdMob, which may use device identifiers for advertising. We will request your permission via Apple’s App Tracking Transparency prompt before any tracking.
Data retention & your rights
- Sign out at any time (Settings → Account → Sign out) to remove the stored identity from your device.
- To delete your leaderboard entry or request data deletion, contact gijsbroekstra@icloud.com.
- You can manage or cancel subscriptions in the App Store, or (for web) via the Stripe customer portal.
Children
BatteryPilot is not directed at children under 13 and does not knowingly collect their data.
Changes
We will update this policy here and revise the date above when it changes.