SilentMile: Private Fitness

About

SilentMile is a GPS tracker for runs, rides, hikes and walks that gives you the training features other apps charge a yearly subscription for, and keeps your workouts on your phone. You pay once, there is no account to create, and the app keeps working in Airplane Mode because nothing in it needs the internet. THE FEATURES OTHER APPS PUT BEHIND A SUBSCRIPTION • Segments. Mark any stretch of road or trail and race your own past times on it, with a live segment telling you mid-run whether you are ahead of your best. • Personal heatmap. Every track you have recorded on one canvas, the roads you repeat glowing brightest. • Routes you can follow. Save a course from any workout or an imported GPX file, then follow it on your next run with live progress and off-route warnings. • Training plans. Couch to 5K, 10K and half marathon, or a plan built for you from a race, a date and your days per week, with paces from your own PRs. • Fitness and freshness. Training load and form over time, matched runs, and this training block against the last one. • Race predictions. Finish times from the mile to the marathon, worked out from your own PRs, with training paces to match. • Workout summaries: a few plain sentences about each workout, written on your iPhone from your numbers. • Replay. Play any workout back along its route with the numbers moving. • Goals for the week, month or year: distance, time, elevation or number of workouts. A COMPLETE TRACKER • GPS recording with live pace, distance, elevation and heart rate. It keeps recording with the screen off. • Manual laps with spoken lap times, and an auto-pause that reads your steps as well as GPS. • A running metronome that clicks at the cadence you set, over your music, with the screen off. • Live Activity on the Lock Screen and Dynamic Island while you record. Numbers only, never your location. • Splits for every mile or kilometer, personal records, heart-rate and pace zones, power estimates. • Routes drawn on your phone from your own GPS points, with no maps SDK in the app. • Apple Watch app that syncs to your phone directly, device to device. • Bluetooth heart-rate straps, cadence sensors and power meters. • GPX and FIT import, GPX export, so your history comes with you and leaves with you. BUILT TO KEEP YOUR DATA ON YOUR PHONE • The app's own code makes zero network requests. There is no server, no account, no analytics and no crash reporting. • The database is encrypted on your device with AES-256. The key is generated on your iPhone and lives only in its Keychain. • The database is left out of iCloud and device backups, so it never rides along in one. Lose the phone and the history goes with it, so export GPX now and then. • App lock with Face ID or a PIN. The PIN is never stored, only a salted hash. • Writing to Apple Health is off by default, for phone and watch workouts. • Erase Everything really erases everything, including workouts SilentMile wrote to Apple Health, and tells you if any step didn't complete. WHAT WE LEAVE OUT ON PURPOSE There is no feed, no followers, no global leaderboards, no live location sharing and no sign-up screen. Each of those needs a server holding your location history, so they are features we won't build. THE FINE PRINT, STATED PLAINLY While GPS is starting, iOS itself may contact Apple's location service for a faster fix. That is the operating system, not SilentMile, and no app can prevent it. In Airplane Mode it stops, and SilentMile keeps working. No app can make a phone unhackable. If your safety depends on your location history staying secret, don't rely on any app, this one included. Everyone else can test the network claims in Airplane Mode. Buy it once and it's yours. We can't sell your data, lose it or hand it over, because we never have it. SilentMile is not a medical device; calories and other metrics are estimates. It is not a navigation app: following a route shows your position on it, with no roads or directions.