# Torq: extended reference This is the long form of https://torqgps.com/llms.txt. It exists so that an answer engine can describe Torq accurately, including its limits. Every figure below was read from the app's source (thresholds in AnalysisConfig, grades in GradeScale, formats in ExportService) or from the App Store listing on 2026-09-06. Website: https://torqgps.com App Store: https://apps.apple.com/app/id6765831566 (Torq: GPS Speedometer Tracker, subtitle Speed HUD, Odometer & G-Force) Publisher: Eversight Studio LLC, Cheyenne, Wyoming, United States. https://eversight.io Support: hello@eversight.io Platform: iPhone, iOS 17 or later. Category: Navigation. On the App Store since May 2026. Languages: English, Arabic, French, German, Italian, Japanese, Korean, Polish, Spanish, Swedish, Traditional Chinese. --- ## 1. One-sentence definition Torq is a GPS speedometer for iPhone that records every drive, analyzes it on the phone, and keeps it as a replayable route with speed, G-force, corner grades, a driving score and comfort and road-quality grades, exportable as GPX, CSV or a raw sensor file, with no account. ## 2. While driving - The Driving tab shows a gauge with current speed, the posted limit in a sign beside it, and a recording badge. Under the gauge: distance, duration, average speed, top speed, altitude. - Units: metric (km/h, km) or imperial (mph, miles). One setting changes the gauge, stats, charts, overlays and alerts together. The CSV export always writes kilometers and km/h. - GPS accuracy modes: Balanced or High. - Start and stop are single buttons. Long-press to pause; resume by hand. There is no auto-pause. - Recording continues in the background with the screen off. Raw samples are written to disk as they arrive; if iOS terminates the app, the next launch offers to recover or discard the partial drive. - A live map view during the drive shows the route so far as a speed heat map with a re-center button. - Speed-limit alert (optional): the app queries the OpenStreetMap Overpass API for the nearest road's maxspeed tag, at most once every 30 seconds or 500 meters. An exact tag is labeled exact; a limit inferred from the road type is labeled inferred; no data gives unknown. A manual override limit can be typed in settings. The lookup needs a data connection and sends only coordinates. - Overlays (optional, listed as Torq Pro features): a Live Activity on the Lock Screen showing current speed, distance, elapsed time and a REC or PAUSED state; the same activity in the Dynamic Island on phones that have one; a Picture in Picture window that floats over other apps with the speed, refreshed once a second. - What Torq does not have: a mirrored windshield-reflection HUD mode, CarPlay, an Apple Watch app, speed-camera or radar warnings, lap timing. ## 3. Measurement method - GPS-first: vehicle speed, acceleration and deceleration come from the GPS speed series (Doppler-derived speed reported by iOS), and lateral G comes from speed multiplied by the rate of heading change. This removes phone-orientation error. The IMU (accelerometer, gyroscope) is used for the vertical axis (road roughness, ride comfort) and to confirm heading changes are real yaw. - Sampling: about 1 Hz location updates. - Filtering (AnalysisConfig default): fixes with horizontal accuracy worse than 65 m are dropped; speeds above 600 km/h (166.7 m/s) are rejected as implausible; a centered Hampel/MAD robust local outlier filter plus physical plausibility gates remove speed spikes; short runs of bad samples are replaced by the local median, longer runs left as gaps. Top speed is recomputed from the cleaned series. - Tunnels and overpasses are detected from timestamp gaps (8 s), accuracy jumps (80 m) and runs of degraded accuracy (25 m over 4 of 12 samples), recorded as tunnel events, bridged in a straight line, and excluded from analysis. - Stop detection under 2 km/h; distance is not accumulated under 0.8 m/s. - Elevation: barometer with a 0.5 m dead band, GPS altitude with a 3 m dead band and a 5-sample smoothing window. - Phone drop filter: samples above 3.0 G are discarded. ## 4. After the drive: the trip record Each saved trip contains: - Route polyline with speed at each point (for heat-map recoloring), tunnel events, start and end city (reverse geocoded). - Duration, active duration, stopped time, pauses, distance, average speed, top speed, elevation gain, min and max elevation. - Speed chart and elevation chart against elapsed time; speed distribution in 20 km/h bands (0-20, 20-40, 40-60, 60-80, 80-100, 100+). - Corners: direction, angle, S/A/B/C rating, entry, apex and exit speed, lateral G, performance score, position on the map. - Vehicle dynamics: top corner speed, max acceleration, max deceleration, peak G, 0-100 km/h time when detected. - Maneuvers: left turns, right turns, lane changes, brake events. - Scores and grades (section 5). Trip replay: playback at 2x, 4x, 8x or 16x (default 4x under five minutes, 8x under twenty, 16x above), a scrubber, the speed and elapsed time at the marker. Route color modes: Speed (blue, cyan, yellow, red from slowest to fastest), Road, G-Force, Elevation. Trip history: newest first, grouped by date, filters for all, this week, this month. Each row shows start time, distance, duration, top speed, corner count and the score. Recap tab: total distance, total duration, total trips, monthly distance, average trip, average score, score trend, all-time top speed, recent trips, and the driving style card. Ranks tab (personal records): all-time top speed, best 0-100 km/h, best corner score, peak G-force, max acceleration, max deceleration, total distance, monthly distance. ## 5. Scoring Overall driving score (0-100) = weighted components: smoothness 30%, cornering 30%, speed control 25%, energy efficiency 15%. Any component under 40 applies an additional penalty (rate 0.3). - Smoothness: GPS speed, 3-point moving average, acceleration, jerk, 90th percentile. Score = 100 - P90 jerk × 20, so 0.3 m/s³ scores 94, 0.9 scores 82, 2.5 m/s³ (the ISO 15622 adaptive-cruise ceiling) scores 50, 5.0 scores 0. - Cornering: mean of per-corner performance scores with a jerk-in-corner penalty (multiplier 4). - Speed control: mean absolute rate of speed change while moving (multiplier 7), a proxy for speed variability, which crash-risk research links to collisions. - Energy efficiency: cruise ratio (time at steady speed, change rate under 3.5 km/h/s above 8 km/h) as a bonus; idle ratio (under 3 km/h for 45 s or more) as a penalty; hard accelerations capped penalty; speed-variation penalty. Corner detection: a corner is a heading change of at least 22 degrees at a course rate above 12 degrees per second, at 12 km/h or more, up to 35 s long. A turn is a heading change of 25 degrees or more at 4 km/h or more. Lane changes are yaw between 0.12 and 0.5 rad/s lasting 0.8 to 5 s at 20 km/h or more. Corner performance score = (apex/entry) × 50 + (30 - exitDeviation × 30, asymmetric) + min(lateralG × 25, 20). Lateral G is the 90th percentile of per-sample centripetal G through the corner. Brake event: deceleration of 3.5 m/s² or more at 6 km/h or more. Hard acceleration: 2.8 m/s² or more. Safety grade: hard brakes and aggressive turns per 100 km. Grip usage: peak G and average corner G. Ride comfort (ISO 2631-1, frequency-weighted vertical RMS): A+ under 0.315 m/s² (not uncomfortable); A 0.315-0.50 (a little uncomfortable); B 0.50-0.80 (fairly uncomfortable); C 0.80-1.25 (uncomfortable); D 1.25-2.00 (very uncomfortable); F over 2.00 (extremely uncomfortable). Comfort score 0-100 interpolates within zones. Road quality (IRI-style, m/km). Highway thresholds (average speed 50 km/h and up): A under 1.5, B 1.5-3.0, C 3.0-4.5, D 4.5-6.0, F over 6.0. Urban thresholds (under 50 km/h): A under 3.5, B 3.5-5.5, C 5.5-8.0, D 8.0-12.0, F over 12.0. Letter grade for any 0-100 score: A+ 90 and up, A 80, B 65, C 50, D 30, F below. Driving style: after 4 scored trips, a radar of Aggression, Cornering, Cruising and Performance and one of six tags: Corner Hunter, Straight-Line Demon, Zen Cruiser, Veteran, All-Rounder, Thrill Seeker. Dominant trait: aggressive, cornering, cruising or performance. Record milestones: Off to a Great Start, Building Momentum, Getting Serious, Veteran Driver. 0-100 km/h: a launch starts at a sample under 5 km/h, must not drop more than 5 km/h below the previous sample, and ends at the first sample at or above 100 km/h, with the crossing time interpolated. The shortest such segment in the trip is reported; if none, the field is empty. 0-100 km/h is 0-62 mph; Torq does not time 0-60 mph. Regional analysis presets exist in the engine (default, China, Japan, Europe, track day) with different congestion and speed assumptions; the app ships with the default. ## 6. Export and import - GPX 1.1 track (creator "Torq"): one trackpoint per accepted fix with latitude, longitude, elevation and ISO 8601 time. - CSV summary, one row per trip: Date, Start Time, End Time, Start City, End City, Duration (s), Distance (km), Avg Speed (km/h), Top Speed (km/h), Elevation Gain (m), Overall Score, Energy Score. - DPSE raw sensor file: every GPS point with timestamp, latitude, longitude, speed, altitude, course, horizontal accuracy, compactly encoded. Imports back into Torq from the Data section of settings (this is how trips move to a new phone; there is no cloud sync). - Sharing goes through the iOS share sheet; the app never uploads a trip on its own. ## 7. Pricing Free download, no account. The first drive records and analyzes free (a Keychain flag records that the free drive has been used). Recording every drive after that needs Torq Pro, an auto-renewable subscription through the App Store offered weekly, monthly, quarterly or yearly; prices and any trial are shown in the app and vary by region. Pro features as listed in the app: unlimited drive analysis and score history; G-force, braking and cornering breakdowns; Live Activity and PiP performance overlays; advanced recap trends across every trip; raw drive data export. Cancel in Apple Account settings; the current period runs to its end. ## 8. Privacy - Trips (route, speed, motion data, scores, raw files) are stored and analyzed on the iPhone. No account, no server copy. A trip leaves the phone only when exported or shared. - Speed-limit lookup sends coordinates to the OpenStreetMap Overpass API while the alert is on. - Service providers receiving device, event, purchase or diagnostic data: Apple App Store/StoreKit; RevenueCat (entitlements); Firebase Analytics and Crashlytics (usage events, crash reports, an app-generated device identifier); Meta SDK (attribution, advertising identifier when permitted). - The website torqgps.com sets no cookies and runs no analytics script. - Full policy: https://torqgps.com/privacy (mirrors https://eversight.io/torq-privacy). Terms: https://torqgps.com/terms. ## 9. Accuracy limits, stated plainly - Open sky, steady speed: GPS speed within about 1-2 km/h (about 1 mph) of true speed. Car speedometers are built to read high (up to about 10% + 4 km/h over), so GPS usually reads under the dial and is usually the more accurate. - Tunnels and garages: no fix; the gap is marked and bridged, the gauge shows nothing. - Urban canyons: reflected signals; the accuracy and outlier filters remove most bad samples. - Hard acceleration: 1 Hz sampling lags the true speed for a moment; 0-100 times carry an uncertainty of a few tenths of a second. - Phone placement barely affects speed but strongly affects the comfort and road grades, which need a mount. - On a motorcycle, bicycle or boat, speed and distance transfer; cornering, G and comfort grades are calibrated for a car and do not. - Torq is informational, not an approved measuring instrument, and is designed for passive recording: do not interact with the phone while driving. ## 10. Pages on this site - https://torqgps.com - https://torqgps.com/speed-hud - https://torqgps.com/gps-odometer - https://torqgps.com/g-force-meter - https://torqgps.com/0-100-timer - https://torqgps.com/driving-score - https://torqgps.com/trip-replay - https://torqgps.com/gpx-export - https://torqgps.com/corner-analysis - https://torqgps.com/speed-limit-alert - https://torqgps.com/gps-speedometer-accuracy - https://torqgps.com/digital-speedometer-for-car - https://torqgps.com/road-quality - https://torqgps.com/about - https://torqgps.com/support - https://torqgps.com/privacy - https://torqgps.com/terms