Last updated / 最終更新日: 2026-05-09
日本語版は本ページ後半 (日本語版へ) にあります。
English version
NextStop Cue (the "App") is a transit alert app that notifies you before you reach your destination station or stop. We designed it to work without an account and to keep your location data on your device.
This Privacy Policy explains what information the App processes, why, and what choices you have. It applies to the iOS app published under bundle identifier com.stationalert.StationAlert and its Apple Watch companion.
Summary
- We do not have an account system.
- Your location is used on your device only to power the arrival alert. We do not transmit, store on a server, or share your location.
- We show ads via Google AdMob. If you grant App Tracking Transparency permission, AdMob may use your IDFA to personalise ads. If you decline, the App still works.
- You can send anonymous diagnostic logs only when you tap the send button in Settings. Nothing is auto-uploaded.
What we use, why, and where it lives
1. Precise location
- Why: to detect when you approach your saved destination and fire the local alert/vibration.
- How it is used: processed entirely on the device by
CoreLocation (Apple's framework). The App declares UIBackgroundModes: location so iOS keeps delivering location updates while the screen is locked or the App is in the background. Without this, OS-only geofence detection lags by 1–2 minutes and the alert misses its purpose.
- Lifecycle: background updates are activated only when you tap Start on a session and are switched off the moment the alert fires or you cancel.
- Storage: location is not persisted beyond the active session and is never transmitted off the device.
- Apple's privacy indicator: while background location is active, iOS shows its standard blue/green privacy pill so you always know.
2. Device identifier (IDFA) for advertising
- Why: to let Google AdMob serve ads, including (with your permission) personalised ones.