Privacy Policy

Last updated: October 18, 2026

Bos Stop ("we", "us") is an unofficial app that shows real-time MBTA arrival times in Boston. It is not affiliated with or endorsed by the Massachusetts Bay Transportation Authority (MBTA). This policy explains what data the app collects, why, and who receives it.

1. Information we collect

• Location. If you allow location access, the app uses your location on your device to find nearby stops. While the Home, Stop or Map screen is open, it also sends us your location rounded to about 100 meters, with its accuracy, at most once every 10 seconds. We use this to understand where the app is used. If you don't allow location, no location is sent.
• Search text. What you type in search (up to 60 characters) and which result you open. If you type an address, that address is sent.
• App activity. Screens you open and buttons you tap (for example, opening a stop, saving a favorite or turning on a departure alert), the stops and routes involved, and the number of days you've used the app.
• How you found the app. The install referrer that Google Play gives the app, such as which ad or link led to the install.
• Device and region settings. App version, your country (from the mobile network and SIM), time zone and language.
• Identifiers. A random ID the app creates when first opened. It isn't linked to your name, account or advertising ID.
• Crash logs and diagnostics. If the app crashes, details of the crash and your device are collected.
• Email you send us. If you write to us from Contact us, we receive your email address and your message. The draft also lists the app version, your device model, Android version and language, which you can delete before sending.

We don't collect your name, contacts, photos or files.

2. Third-party services

These services receive data directly from the app and handle it under their own privacy policies:

• Google AdMob shows ads. It collects your device's advertising ID, IP address (used to estimate general location), ad interactions and diagnostic data, and uses them for advertising, analytics and fraud prevention. You can reset or delete your advertising ID in your device settings.
• Google Analytics for Firebase and Firebase Crashlytics collect app usage, crash reports, app identifiers, your advertising ID, and approximate location derived from your IP address. Search text and your device location are not sent to Google Analytics.
• Google Maps shows the map and your location on it.