YourLeft Privacy Policy

YourLeft (app.keepleft.mobile) operates as a local-first application. When you record an outdoor workout, calculate metrics, or generate a 3D animated replay, all processing executes locally on your smartphone or browser client.

We do not maintain a central user database, identity service, or cloud server that collects personal movement histories. Your activity history is never uploaded to any remote YourLeft server.

To provide the core application functionality, the app creates and maintains the following records strictly within your device’s private local sandbox:

• GPS Coordinate Fixes: Latitude, longitude, timestamp, speed, bearing, and altitude samples acquired from your device's GPS sensor during an active recording session.
• Derived Exercise Metrics: Elapsed duration, total distance, average pace, moving speed, and elevation gain calculated from accepted satellite fixes.
• User Preferences: Selected measurement units (metric/imperial), preferred camera replay mode (Follow, Orbit, Overview), and interface toggles.
• Storage Technology: On Android, records are saved in the application's private, encrypted SQLite database. On Web and iOS beta, records are stored in browser IndexedDB.

YourLeft requests permission to access your device's physical location to accurately measure and visualize outdoor workouts:

Immediate Cessation: GPS polling stops the exact millisecond you tap Pause, Finish, or Discard on an activity. YourLeft does not poll your location when you are not actively recording a session.

To render the stylized 3D miniature world with accurate terrain contours, roads, and building outlines, YourLeft queries external geographic data sources:

• OpenStreetMap & Overpass API: Vector map geometry (road centerlines, building footprints, waterways, green areas) is obtained from OpenStreetMap contributors under the Open Database License (ODbL). Queries transmit the approximate geographic bounding box of the area being viewed.
• Terrain & Elevation Services: Elevation raster tiles are requested to construct the 3D ground topography based on standard web map tile coordinates.
• Network Metadata: Requests made to external geodata endpoints transmit standard HTTP metadata, including your IP address and User-Agent header, as required for any internet communication.

YourLeft includes a creative Story Studio that allows you to generate transparent route PNG stickers, animated GIFs, or photo videos for sharing to platforms like Instagram, Strava, and WhatsApp:

• Local Photo Processing: If you select a photo from your gallery to place your route upon, the photo is loaded directly into volatile device memory. YourLeft never uploads, stores, or claims intellectual property rights over your personal photographs.
• Default 200-Metre Endpoint Masking: Because running routes often start or end at a home or workplace, YourLeft automatically hides the first 200 metres and last 200 metres of any activity longer than ~500 metres during social exports. For very short activities where masking is mathematically unfeasible, the interface alerts you so you can make an informed decision before sharing.
• Explicit User Dispatch: No export leaves the app automatically. Files are generated on-device and shared exclusively via your explicit tap on the system Share Sheet or Clipboard copy action.

YourLeft contains no advertising SDKs, no behavioral trackers, and no third-party analytics platforms (such as Google Analytics, Firebase Analytics, Meta Pixel, or AppsFlyer).

We do not sell, rent, monetize, or disclose your location or activity metrics to data brokers, advertisers, insurance providers, or research entities.

Because your activity data resides entirely on your device, you hold 100% control over its lifecycle:

We implement industry-standard mobile and web security architectures to safeguard your information:

• Operating System Sandboxing: Android private storage ensures other installed applications cannot access your saved GPS records or activity databases without device root compromise.
• Encrypted Transport (HTTPS/TLS): All map data, 3D building outlines, and terrain elevation requests utilize encrypted HTTPS connections.
• Immunity to Server Breaches: Because YourLeft maintains no centralized cloud database of user coordinates, your location history cannot be leaked via remote server compromises or third-party database breaches.

YourLeft is designed for general audiences and fitness enthusiasts. It is not directed toward children under 13 years of age (or under 16 in certain jurisdictions such as the European Union and United Kingdom). We do not knowingly collect, solicit, or process personal data from children. If a parent or guardian becomes aware that a child has installed the app, uninstalling the app immediately wipes all local workout records from the device.

Under global privacy legislation including the EU General Data Protection Regulation (GDPR) and the California Consumer Privacy Act (CCPA):

• Right to Portability & Access: You can export any single activity or your entire workout history as open standard .geojson files at any time through the in-app Activity Library.
• Right to Erasure: You can permanently delete your activities, cache, and settings on demand using the in-app controls.
• Notice Regarding Server Requests: Because YourLeft collects no identifying information or user accounts on our servers, we have no technical means to associate a remote request with any specific user's physical device.