AfterLap: Lap Timer & Replay

Your iPhone is the lap timer: live delta on track, 0–60 and quarter-mile runs, every drive rebuilt in 3D. Then race other drivers' real laps on afterlap.io.

AfterLap turns your iPhone into a lap timer and data logger. Mount it, press Start, drive. Every lap comes back as times, sectors and a 3D replay of your car on the real track. Timing comes from your iPhone's own GPS and 100 Hz motion sensors: no external GPS logger, no cables. On afterlap.io, your laps then race real laps of other drivers.

ON TRACK • Live lap time, sectors and delta to your best lap, readable at a glance in the mount • Hot-lap mode: one tap and the screen shows just two numbers, a huge live delta and your last lap, in portrait or landscape • Recording runs offline and keeps going with the screen locked; a Live Activity shows the session on the Lock Screen and in the Dynamic Island • Right after the session: every lap, your best lap and sector times, offline in the paddock

EVERY DRIVE IN 3D • Your recording is processed in the cloud: GPS and motion sensors are fused into one smooth line • Watch any drive as a 3D replay, with your car in its color, right in the app • Link your onboard video once and it plays in step with the 3D replay • Share a replay as a link that plays in any browser

COMPARE YOURSELF • Leaderboards for every circuit, sprint course and acceleration interval, searchable by car • Watch how a faster driver in your car takes each corner, then race their lap in 3D on afterlap.io • Every result is judged from its own recording by the same rules for everyone, so the boards show real driving

NO TRACK DAY YET? • Time your car: 0–60 mph, 0–100 km/h, quarter mile, 100–0 braking and more • Compare your runs on the boards and in virtual races against other cars

SPRINTS AND HILL CLIMBS • Point-to-point runs timed from start to finish line, run after run

YOUR GARAGE • Add your car with a photo; AfterLap suggests make, model and paint • Every session keeps the car and tires you drove

PRIVACY • You decide whether other drivers see your name or an alias • Delete sessions, cars or your whole account at any time

Leaderboards, the full analysis and virtual races are also at afterlap.io, in any browser.

Use AfterLap only where timed driving is allowed: on race circuits, at track days, on closed courses and at drag events. Mount the phone securely; the cockpit needs no touch while driving.