Redline: 0-100 & Speed Tracker
How to use
- Mount and drive: put your phone in a dashboard mount. Trips start automatically above 15 km/h and finish after 10 minutes parked (you'll be asked first). You can also tap Start Trip.
- Launch timing: come to a full stop and the timer arms itself; 0–10, 0–50, 0–100 km/h and more are timed from GPS. Only on closed tracks or private roads.
- Landscape dashboard (Pro): rotate the phone. Long-press a card to choose your 7 metrics; the bottom-right card follows your drive.
- Drive Display: a full-screen speed + map display for cars without a display behind the wheel, such as Tesla Model 3/Y. Mirror mode works with windshield HUD reflectors.
- CarPlay: connect to CarPlay to see your trip and start or stop recording from the car screen.
FAQ
Why is my 0–100 time missing? A run only counts from a full stop, without lifting off (speed must not drop by more than 5 km/h), and with good GPS reception. Runs are timed outdoors only.
How accurate is it? Speed comes from GPS Doppler data, typically within about 1 km/h, with crossing times interpolated between fixes. Results are approximate and not suitable as evidence.
Trips don't start when the app is closed. Allow "Always" location in Settings › Redline › Location and keep "Start trips automatically" on. iOS wakes the app on larger location changes, so the first minute of a drive may be missed.
What do Pro and Drive Display include? How do I restore them? Pro removes ads and unlocks every metric, the landscape dashboard, the Lock Screen Live Activity and unlimited history. Drive Display is a separate purchase. To restore, open Settings in the app and tap Restore Purchases.
How do I delete my data? Swipe to delete trips in History, or use Settings › Delete All Data. Deleting the app removes all its stored data.
Privacy: see our Privacy Policy.