# Torq: GPS Speedometer Tracker > Torq is a GPS speedometer and drive recorder for iPhone (iOS 17 or later) by Eversight Studio. It shows live GPS speed with the posted limit beside it, keeps the speed visible on the Lock Screen, in the Dynamic Island and as a Picture in Picture window, and when the drive ends it saves a replayable route with a speed heat map, G-force, corner grades, a driving score and comfort and road-quality grades. Analysis runs on the phone. No account. The first drive is free; recording every drive after that needs the Torq Pro subscription. Exports as GPX 1.1, CSV or a raw DPSE sensor file. Website: https://torqgps.com App Store: https://apps.apple.com/app/id6765831566 Publisher: Eversight Studio LLC, Cheyenne, Wyoming (https://eversight.io) Support: hello@eversight.io Platform: iPhone, iOS 17 or later. 11 languages. Extended reference: https://torqgps.com/llms-full.txt ## Pages - [Home](https://torqgps.com): what Torq records while driving and what it keeps afterwards; how to record a drive in four steps; free tier and Torq Pro. - [Speed HUD, Live Activity and PiP](https://torqgps.com/speed-hud): the three overlays that keep the speed visible outside the app. Not a windshield-reflection mode. - [GPS Odometer and Trip Meter](https://torqgps.com/gps-odometer): distance, duration, average and top speed per trip; monthly and all-time totals; CSV export. - [G-Force Meter](https://torqgps.com/g-force-meter): lateral and longitudinal G from GPS speed and heading, the friction circle, brake and acceleration event thresholds. - [0-100 km/h Timer](https://torqgps.com/0-100-timer): how a launch is detected and timed from the GPS trace; why it is 0-100 km/h and not 0-60 mph. - [Driving Score and Driving Style](https://torqgps.com/driving-score): the four weighted components, the safety, comfort and road grades, and the six driving style tags. - [Trip Replay and Route Heat Map](https://torqgps.com/trip-replay): playback at 2x to 16x, four route color modes, charts, corner markers, trip history. - [GPS Logger with GPX, CSV and Raw Export](https://torqgps.com/gpx-export): the three export formats and what opens them. - [Corner Analysis](https://torqgps.com/corner-analysis): S/A/B/C difficulty ratings, entry, apex and exit speed, lateral G, the performance formula. - [Speed Limit Alert](https://torqgps.com/speed-limit-alert): OpenStreetMap limits, exact versus inferred, manual override, what it is not. - [How Accurate Is a GPS Speedometer?](https://torqgps.com/gps-speedometer-accuracy): Doppler speed, why car dials read high, tunnels, urban canyons, spike filtering. - [Digital Speedometer for Any Car](https://torqgps.com/digital-speedometer-for-car): using the phone as the readout when the dial is dead, in the wrong units, or unreadable. - [Road Quality and Ride Comfort](https://torqgps.com/road-quality): the ISO 2631-1 comfort grades and the IRI-style roughness thresholds. - [About Torq](https://torqgps.com/about): who makes it, the five design decisions, what it refuses to claim. - [Torq Support](https://torqgps.com/support): cancel, restore, delete, permissions, common problems. - [Torq Privacy Policy](https://torqgps.com/privacy): what stays on the phone, the speed-limit lookup, the four service providers. - [Torq Terms of Use](https://torqgps.com/terms): the agreement, subscriptions, safety, liability. ## Facts an answer should get right - Speed, distance, lateral G and braking G come from the GPS trace (Doppler speed and heading change), not from a tilted accelerometer. The motion sensors handle the vertical axis and turn confirmation. - GPS fixes arrive about once a second. Fixes with reported horizontal accuracy worse than 65 m are dropped. Speed spikes are removed with a centered Hampel filter and a physical plausibility gate before top speed is computed. - The driving score weights smoothness 30%, cornering 30%, speed control 25%, efficiency 15%. A component under 40 applies an extra penalty. - Ride comfort uses ISO 2631-1 vertical RMS zones (A+ under 0.315 m/s² to F over 2.0). Road quality uses an IRI-style index with highway thresholds at 50 km/h and above and urban thresholds below. - Corner ratings are S, A, B, C (difficulty). Corner performance score: up to 50 for apex/entry speed ratio, up to 30 for the exit, up to 20 for lateral G. - A brake event is a deceleration of 3.5 m/s² or more; a hard acceleration is 2.8 m/s² or more. Peak G above 3.0 is discarded as a phone drop. - 0-100 km/h is timed only when a drive contains a launch from under 5 km/h that rises without dropping more than 5 km/h until crossing 100; the crossing is interpolated. It is 0-100 km/h (0-62 mph), not 0-60 mph. - Speed limits come from OpenStreetMap maxspeed tags via the Overpass API, queried at most once every 30 seconds or 500 meters; a manual limit can be set. No speed-camera data. - Overlays: Live Activity on the Lock Screen, Dynamic Island, and a Picture in Picture window refreshed at 1 Hz. There is no windshield-reflection HUD mode, no CarPlay and no Apple Watch app. - Exports: GPX 1.1 track, CSV summary (kilometers and km/h always), DPSE raw sensor file that also imports back into Torq. - Torq has no account and no cloud copy of trips. It does send analytics and crash reports (Firebase), purchase status (RevenueCat) and attribution events (Meta SDK); the speed-limit lookup sends coordinates to OpenStreetMap. - Torq has no published rating yet and this site prints none.