Track4Facts PRO: 0-60 Timer

Track4Facts PRO turns your iPhone into a GPS driving recorder for sprint, distance, lap and sector timing. Record your drives, compare acceleration runs and explore your driving with maps, charts and motion-sensor analysis.

Download for free and measure 0–60 mph or 0–100 km/h at no cost. Unlock advanced features with one purchase. No subscription. Previous purchasers of the paid app retain the Full Version.

FREE FEATURES • GPS speedometer and ride recording • Speed, distance, duration, average speed, top speed, elevation and stops • 0–60 mph or 0–100 km/h sprint timing • iPhone sensor fusion for eligible standard sprints • Background recording with the screen locked • Live Activity on the Lock Screen and Dynamic Island • Maps, Race Summaries and ride history • One vehicle profile in the Garage • Apple Watch remote control and optional heart-rate recording • Import existing Track4Facts backups

FULL VERSION — ONE-TIME PURCHASE • Custom sprint ranges from a standstill or while rolling • Sprint comparison across rides and vehicles: overlay speed curves, inspect speeds at the same elapsed time and find the fastest comparable recorded run • Distance timing with splits and finish speed; metric, imperial and custom targets • Automatic lap and sector timing with live delta to your best lap • Create tracks by drawing on the map or driving a survey lap • Lap comparison with speed and time-delta charts, corner analysis and deceleration onset • Theoretical best lap from best sectors and lap consistency • Ghost Lap: replay two laps together or compare with an ideal lap assembled from best sectors • Braking analysis with deceleration traces and corner comparisons • Friction-circle and corner-dynamics analysis using GPS and available iPhone motion data • Vibration analysis with intensity, peaks, route colours and a time graph • Interactive 3D route and elevation visualisation • Ride replay and speed, elevation and acceleration charts • GPX, waypoint CSV and motion CSV export • Complete backups and multiple vehicle profiles • External GPS receiver support

GPS + IPHONE MOTION SENSORS Developed with AI assistance, the sensor-fusion algorithm combines GPS and motion data to estimate launch, speed progression and GPS delay for eligible 0–60 mph and 0–100 km/h runs. Your iPhone must remain firmly mounted. Regular fusion is used only when its checks pass; GPS remains available for comparison. Suitable recordings may also receive a separately labelled ≈ estimate after the ride. Estimates do not become confirmed records. New rides store motion data at a nominal 50 Hz, independently of the GPS update rate. Older rides can be analysed when their stored data is sufficient.

APPLE WATCH Start and stop regular recordings and view live ride data from your wrist. Optional Race Training records heart rate and saves a workout to Apple Health with permission. Heart rate is excluded from exports by default; including it in backups and waypoint CSV requires separate consent.

EXTERNAL GPS Supports Dual XGPS150/XGPS150A, XGPS160 SkyPro and Dragy Lite. Dragy Lite offers selectable 10, 20 or 25 Hz updates. More samples can provide finer time resolution, but do not guarantee greater accuracy.

UNDERSTAND YOUR RESULTS Standstill checks, interpolation and checks for gaps, poor fixes and implausible changes help assess each attempt. Quality labels and explicit estimate labels explain its basis. In-app FAQs and illustrated help cover measurement methods and their limits. Each ride retains its measurement configuration. Later settings changes do not change its recorded ranges. GPS and sensor fusion remain estimates; no fixed timing accuracy is guaranteed. Track4Facts PRO is not a calibrated measuring instrument.

SAFETY Perform performance measurements only on private, closed-off or expressly approved tracks and areas. Secure your phone and never operate it while driving. Applicable laws, local regulations and safety requirements must also be observed there.