Privacy Policy

This privacy policy applies to the mDevices app (the "Application") for Android and iOS, published by Trei (the "Service Provider"). mDevices and mFamily are the same app under two names. The Application is a family location-sharing and device finder app: it shows where your own devices and the devices of family members you have linked with are on a private map.

Location

The Application collects the precise location (GPS latitude and longitude, accuracy, altitude, speed, heading and the time of the reading) of each device you sign in on. This is the core purpose of the app. It is used to:

• show the device's position on your map and on the map of family members you have linked with;
• find a lost or misplaced device, including one that is offline, from its last known location;
• send an SOS alert with your location to linked family members when you press SOS;
• tell linked family members when a device enters or leaves a place you saved (geofence alerts).

Background location. If you allow location access "All the time" (Android) or "Always" (iOS), the Application also collects location while it is closed or not in use. It reports the location about every 30 minutes (your phone's operating system may delay this to save battery), when you open the app, and when a linked family member asks your device to refresh its location or ring. The Application explains this and asks for your agreement before it requests background location permission.

You can stop location collection at any time: change the location permission to "While using the app" or "Never" in your phone's settings, remove the device from your account in the app, or unlink the family member. Location is never sent to advertising networks or analytics services, and it is never sold.

Information the Application collects

• Account information: when you sign in with Google or Apple, your name, email address, profile photo link and a user ID. If you continue as a guest, only an anonymous user ID is created.
• Device information: device name, type, manufacturer and model, operating system version, Android ID, battery level and charging state, storage, memory, processor and sensor details, network type, mobile carrier name, SIM country and IP address.
• Installed apps (Android): the list of apps that Android lets the Application see on the device (app name, package name, version and install/update dates), sent with the device information above.
• Family and care information (mFamily features): the email addresses you send link requests to, the family members you link with, saved places, SOS alerts, and any medication reminders, doctor appointments and care notes you add.
• Notification token: a push notification token so the app can deliver alerts and ring or refresh commands.
• Usage, diagnostics and crash data: screens viewed, app interactions, app version, crash logs and error reports.
• Advertising ID: used by the advertising networks below for users who have not bought Premium.

The Application does not read your contacts, messages, call logs, photos, IMEI or SIM serial number.

Who can see your data

• You can see your own devices, their latest location and device details, and their location history.
• Family members you link with. Linking needs both people: one sends a link request by email and the other accepts it in the app. Once linked, each person can see the other's devices, including the latest location, battery level and the device information above, plus SOS alerts, geofence alerts and shared care information. Either person can unlink at any time from the app, which stops the sharing straight away.
• The Service Provider stores the data on its own servers to run the app and does not sell it.

Third-party services

The Application uses the following services, which process data under their own privacy policies:

• Firebase (Google): sign-in, push notifications, analytics and crash reporting.
• Google AdMob and Meta Audience Network: advertising for users without Premium. These receive your advertising ID and ad interaction data, not your location.
• Meta App Events: app install and usage events for measuring ads.
• RevenueCat: processing Premium purchases made through Google Play or the App Store.
• Sign in with Google or Apple.

The Service Provider may also disclose information when required by law, or when it believes in good faith that disclosure is needed to protect someone's safety, investigate fraud or respond to a lawful government request.

Data retention and deletion

• The server keeps each device's latest location, which is replaced by every new report. Location history records and device information are kept until you remove the device or delete your account. There is no automatic expiry.
• Remove a device: removing a device in the app deletes that device, its device information and its location history from the server.
• Delete your account: Profile → Delete Account deletes all your devices, their location history and your sign-in account.
• To delete everything else (your profile record, family links, saved places, SOS alerts and care information), or to request deletion without the app, email trei.mainguy@gmail.com from the email address on your account. The Service Provider will delete it and confirm by email.
• Data stored only on your phone is removed when you uninstall the app or clear its data.

Children

The Application is not directed at children under 13, and the Service Provider does not knowingly collect personal information from them. If you are a parent or guardian and believe your child has given us personal information, email trei.mainguy@gmail.com and it will be deleted.

Security

Data is sent to the Service Provider's servers over encrypted connections (HTTPS). The Service Provider uses physical, electronic and procedural safeguards to protect the information it stores.

Changes

This policy may be updated from time to time. The latest version is always on this page, with the date below.

This privacy policy is effective as of 2026-09-23.

Contact

For any privacy question or request, email trei.mainguy@gmail.com.