TerraMark Privacy Policy
Last updated: November 12, 2026
TerraMark ("the app") is a camera app that stamps GPS coordinates onto your photos. It is published by Matte Advisory Group ("we", "us"). This policy explains what data the app uses.
Location
The app uses your device's precise location only while the app is open to show your coordinates and stamp them onto photos you take. Location is processed on your device. We do not collect, store on our servers, share, or sell your location. The app does not use background location.
Position integrity checks
To detect fake-GPS apps, spoofing and jamming, the app reads satellite signal information, the phone's motion sensor and a coarse network position while it is open. This information is processed on your device only and is stored only as a short integrity note with each photo in the on-device photo log. It is never uploaded.
Camera and photos
The camera is used only to take the photos you choose to take. Photos are saved to your device's photo gallery (on Android 10 and later, in a "Pictures/TerraMark" folder). Camera settings such as flash, brightness, shutter speed, ISO and white balance are applied on your device only. If "Write GPS into photo metadata" is enabled, your coordinates are also stored inside the photo file's EXIF data — be aware of this if you share the photo. We never upload your photos.
Photo log and exports
The app keeps a log of the photos you take with it (coordinates, time, compass direction, your note and a small preview image) in the app's private storage on your device, so you can export them as a CSV spreadsheet or a Google Earth (KMZ) file. The log never leaves your device unless you choose to export and share a file yourself. You can clear it at any time in Settings; uninstalling the app also deletes it.
Map
The photo map shows your logged photos on a map. On Android the map is provided by Google Maps; on iPhone by Apple Maps. To draw the map, the map provider receives the map area being viewed along with standard technical data (such as IP address, device model and OS version, and crash reports from the map component). On Android this is described in Google's Maps SDK data disclosure and governed by Google's privacy policy (policies.google.com/privacy). Your photos and photo log are never sent to the map provider.
TerraMark Pro subscribers can also choose the "Esri Imagery" map layer, provided by Esri (Environmental Systems Research Institute, Inc.) through ArcGIS Location Platform. When that layer is on, Esri receives requests for the map tiles of the area being viewed, together with standard technical data such as IP address. No account details, photos or photo log are sent to Esri. See esri.com/en-us/privacy.
Purchases
TerraMark Pro is an auto-renewing subscription. Purchases, renewals and cancellations are processed by Apple (App Store) or Google (Google Play); you can cancel at any time in your store account's subscription settings. We use RevenueCat, Inc. to validate purchases and restore them. RevenueCat receives an anonymous app user ID, purchase receipts and basic device information needed to verify purchases. See revenuecat.com/privacy. We do not receive your payment details.
Analytics and advertising
The app contains no ads and no third-party analytics or tracking.
Children
The app is not directed at children under 13.
Changes
We may update this policy; the date above will change when we do.