Privacy Policy

What the app does not have

• No account, no sign-up, no password.
• No advertising, no trackers.
• No profile, and no history of your searches or your routes anywhere but on your phone.
• No data sold, rented or passed to anyone for commercial purposes.

Your location

With your permission, the app reads your location to center the map and to use as the starting point of your routes. It stays on your phone. You may refuse that permission: the app then works from a point you choose on the map.

To build a route, it needs the paths and terrain of the area. The app therefore asks for the data of an area around that point, a rectangle several kilometers across, and never your exact position. The servers contacted see an IP address and a geographic area, for the duration of the request, with no identifier attached.

The name of the starting place is the exception. When the app writes “start at 9 Rue Monfroux”, it asked your phone's map service for that name, sending it the coordinates of that single point. It is the only time a precise position, rather than an area, leaves the device.

Services contacted

The first on the list is ours. The others are public services, or your phone's own.

• TrailGen's file service : hosted on Cloudflare. It receives the area the app needs, and nothing else: no account, no identifier, no cookie. Like any web server, it logs access, with the IP address.
• RevenueCat : checks the unlock. It receives the App Store purchase receipt and an anonymous identifier created by the app, with no name and no account. Without a purchase or a restore, it receives nothing.
• Overpass API : OpenStreetMap paths, on public instances.
• The IGN : elevation in France and its territories.
• AWS Open Data : elevation in the rest of the world.
• Mapbox : on iPhone, the base map.
• Apple Maps : on iPhone, the name of the starting place.
• Google Maps : on Android, the base map and the name of the starting place.

Each has its own privacy policy. The app sends them no account, no identifier and no history.

The purchase, and the review prompt

TrailGen is free. One purchase, on the App Store, unlocks GPX export, the Apple Watch app, nutrition plans and unlimited searches. Payment happens entirely with Apple: we see neither your payment method, nor your name, nor your address. We receive aggregated sales reports, in which nobody is identifiable.

The app sometimes offers to leave a review. The dialog that opens is the system's, not ours, and we do not learn whether you answered it.

What stays on your phone

• your saved routes, with their track and name;
• the paths and terrain of areas already visited, so later searches are fast and work offline;
• your nutrition plans and your list of foods;
• the unlock status, and the number of searches made today;
• your display settings and a few internal markers, such as whether the introduction has been seen or a review prompt has already happened. None of them identifies you.

Nutrition reminders are scheduled on the phone itself and go through no server.

None of it leaves the device. The About screen reports how much space the stored paths and terrain take, and lets you clear them; your saved routes are not affected by that. Deleting the app deletes all of it.

Sharing a route

When you export a route as GPX, the file goes where you send it: your watch, another app, a message. An image or a video of the route follows the same rule. The app keeps no copy and sends them nowhere on its own.

Apple Watch and Health

On Apple Watch, with your permission, each run is saved to Health as a workout: duration, distance, energy burned and route. The app writes this data and reads none of it. It stays in Health, under Apple's rules, and does not reach us.

The route you follow goes from the phone to the watch over Apple's local link. While you run, the location read by the watch is used to place you on the route, and stays on the watch.

Children

The app asks for no age, no name and no address, and builds no profile. It therefore collects nothing concerning children.

Your rights

We hold no data about you. There is no account, no database and no backup: nothing to consult, correct, export or delete on our side, and so nothing to request.

The data that concerns you is on your phone, and it is yours to manage: a saved route is deleted from the list, stored areas are cleared from the About screen, and uninstalling the app erases everything. If a question remains, write to us.

Changes to this page

Any change will be published here, with its date.

Contact

A question about this page, or about the app: alexis.leb@icloud.com