Name: HotLap: Motorsport Track Day Lap Timer & Telemetry
Rating: 5 (4 reviews)
Author: dustinsterk

*** HotLap is Free to Try — 3 Laps Per Session: run as many sessions as you like, with each session capped at 3 recorded laps.
To record unlimited laps, unlock PRO with a one-time purchase of $6.99 — no subscription!
To unlock PRO, open the menu (tap the screen, or hold the UP button), scroll to the bottom (above the Version line), and follow the on-screen instructions. Your watch needs internet — via Wi-Fi, or the Garmin Connect app open and paired on your phone to complete the purchase. Thanks for your support! ***

Pick your circuit from a built-in database of 5,600+ tracks and HotLap sets the start/finish line, real sector splits, and pit-lane data — then just start the session & drive. Or set your own line, auto-lap by distance, or tap for manual laps. Live delta-to-best, G-force, and a full activity you save and review in Garmin Connect. Built for track days, HPDE, autocross, karting, motorcycling and club racing, plus touring on snowmobile, ATV, boat or jet ski.

Save it as a standard Garmin activity — GPS track, speed, HR, temperature, elevation, lap splits, plus custom fields (G traces, per-lap & session G maxima, sector times, ascent/descent, SpO2, respiration). Export the FIT from https://connect.garmin.com/app/home to analyze in third-party motorsport tools.  I highly recommend AimMac (https://aimmac.app/) if your an MacOS user.


TRACK DATABASE
- 5,600+ circuits worldwide — road courses, ovals, karting, layout & CW/CCW variants
- Select Track from the menu: nearest first by GPS, sets your start/finish automatically
- Real per-track sectors (up to 8) and pit-lane detection where the data exists


LAP TIMING
- Position (start/finish line), Distance (presets 0.25-10 mi), or Manual (tap)
- Catch zone sized from the real line width + a direction check that rejects wrong-way laps and interpolation for accurate timing.
- Live delta-to-best, predicted lap, best lap, theoretical best
- Sector timing — real per-track sectors, or 3 even splits — with per-lap history
- Pit in/out-lap tagging and pit-stop duration; in/out laps are excluded from your best


SCREENS (page up/down to switch)
- Dashboard: at-a-glance grid — lap, sectors, speed, avg, distance, G, laps, temp, battery
- Simple Lap: big current-lap time colored vs. best, with delta and best lap
- Timing: current lap, predicted, best, theoretical best, live sector deltas
- Stats: best lap, laps, avg/max speed, distance, max G/HR/temp, ascent/descent, SpO2, respiration, pit best/total, track name
- Lap List: scrollable history with sector splits and IN/OUT pit-lap tags
- Track Map: GPS trace, auto-fit, heading-up follow/zoom
- Trip (Distance/Manual lap method): moving time, distance, distance/time back to start (or remaining to a Trip Target), ascent/descent
- Results: best lap + G for racing, or moving time + climb for touring, plus pit summary


SETTINGS
- Lap Method + trigger; Select Track; Session Screen (screen on start); Trip Target
- Units (mph / km/h / knots), Auto Pause/Start, Alert Timer, Lap Beep, GNSS Mode Selection
- Sounds (Quiet mutes tones, keeps vibration); Activity title; Strava (Generic) export; Force Pulse Ox


Full the User Manual located here:  https://www.thesterk.com/HotLap/UserManual.html
Search the built in Tracks here:  https://www.thesterk.com/HotLap/TrackSearch.html


*** Safety: HotLap is a timing and data tool for use on closed courses, private property, and other appropriate venues. Don't interact with your watch while operating a vehicle or other motorized device — keep your eyes up and hands on the controls. Always obey traffic and venue rules and operate within your abilities. Use at your own risk. ***


Tags:
lap timer, motorsport, track day, HPDE, autocross, racing, sectors, delta, G-force, telemetry, karting, road course, driving, auto racing, road racing, club racing, autox, apex, laps, time trials, time attack, motorcycling, snowmobiling, ATV, motocross, enduro off road, 4x4 off road, boating, sailing, jet skiing, hot lap