Start/Finish, Sectors, Delta
The app detects start/finish, stores sector splits, and shows live delta against the selected reference lap so drivers can see where the time is coming from.
Ready to go faster?
G-Box
25 Hz GPS lap timing, acceleration testing and live vehicle data in one track-day system.
Company
Built and operated by RACEMEASURE LLC
RACEMEASURE LLC is a Florida limited liability company developing mobile and web software for motorsport timing, onboard video, GPS telemetry, and post-session analysis.
Legal entityRACEMEASURE LLC
Business address8380 NW 25TH CT, Sunrise, FL 33322, United States
Phone+1 954 459 3963
G-Box Lap Timer
Mobile and web tools designed for drivers, teams, and track-day analysis.
G-Box Hardware · $199
Compact GPS lap timer, power meter and cockpit display in one track-day device.
G-Box is made for HPDE, track days and club racing. Its 25 Hz GPS measures lap times and builds smooth speed traces, while Bluetooth and Wi-Fi give you two simple ways to connect. It shows whether you are faster or slower than your best lap, estimates car power from acceleration, records your session, and sends the data to the G-Box app for overlays, leaderboards and AI coaching.
25 HzHigh-rate GPS
3.5 inTouch display
PowerAcceleration estimate
Automatic Lap TimingMeasures current, previous and best lap using track start/finish logic from the racing workflow.
Best-Lap Delta StripShows whether the driver is gaining or losing time compared with the best reference lap.
Custom TracksCreate and use your own circuits with start/finish markers and automatic nearby-track sorting.
Power EstimateAcceleration screens help estimate how the car pulls on straights and after corner exit.
Bluetooth + Wi-FiChoose a simple Bluetooth connection or Wi-Fi for the highest-rate live GPS and telemetry link.
App-Friendly SetupNo engineering workflow: pair the device, choose a track, drive, then review the laps.
Session RecordingKeeps the data needed for maps, graphs, overlays, AI review and leaderboard submission.
Dark Racing UIHigh-contrast lap timer and power screens are designed for quick cockpit reads.
Easy Connection
- Connect the device to the G-Box app over Bluetooth or Wi-Fi.
- Use 25 Hz GPS data for cleaner lap timing and smoother speed traces.
- Review each stint later with maps, graphs and video overlay.
- Share your best results to local or online leaderboards.
For Drivers
- Large lap timer for quick cockpit reads.
- Best-lap delta to show if the current lap is improving.
- Simple power and acceleration screens for straight-line comparison.
- Portable, battery-powered device for HPDE and track-day use.
Universal Telemetry Import
One workspace for files from G-Box, RaceChrono, Harry's LapTimer, MoTeC, AiM, Traqmate, VBOX and simulator CSV logs.
G-Box is built to bring many track-day files into one simple review screen. The iPad importer accepts single files, folders, session packages, linked onboard video, simulator CSV logs such as Assetto Corsa-style exports, vendor tools, and full RaceChrono RCZ archives, then turns them into clean sessions with laps, GPS points, Speed/G traces, car details and source files preserved.
GBO
VBO / TXT
RaceChrono RCZ
Harry's LapTimer HLPTRL / SQL
LapTimerGPSRecDB.csv
MoTeC LD / LDX
AiM DRK
Traqmate TQM / TQS
GPX / KML / GPS logs
Assetto Corsa / Simulator CSV
MP4 / MOV / M4V
Smart linked import
Select telemetry once and the app looks for matching laps, metadata, OBD logs, source sidecars and onboard video in the same folder.
Canonical GBO library
Every imported run becomes a normalized session with track name, driver, car, top speed, distance, laps, invalid-lap filters and source-file provenance.
Vendor-aware parsing
Traqmate TQM/TQS, MoTeC LD/LDX, AiM DRK, RaceChrono RCZ and Harry's LapTimer exports are parsed into the same Speed, Long G and Lat G model used by the native analysis screens.
Open CSV bridge
CSV exports from other loggers or simulator pipelines, including Assetto Corsa-style datasets, can be read when they include usable time, position, speed or G-force columns.
From Live Driving To Engineering Review
The app is organized around the way a track day actually works: record clean data, keep video aligned, clean up questionable laps, compare the right reference, then decide where time is being lost.
Race
Live lap timer with selected track, reference lap, start/finish detection, sector timing, delta bar, speed and G-force. Low-frequency GPS is handled with crossing interpolation so phone GPS and high-rate receivers can share the same lap logic.
Video and overlay
Back, front and dual-camera recording can be packaged with telemetry. Overlay jobs keep the same Speed/G/map layout and can be sent to the server composer for finished review videos.
Sessions
The library stores track, car, driver, tire, best lap, invalid laps and linked media. Sessions can be shared as an AILapSession package with manifest, telemetry and videos.
Analysis and AI
Analysis compares one or two laps, builds theoretical-best sector combinations, marks entry/apex/exit zones, and sends filtered telemetry to AI models such as Racing Instructor, Racing Engineer and F1 Engineer.
Tap Through The App
Each screen below opens larger. The screenshots are now part of the product tour: Race for live timing, Sessions for cleanup and sharing, Analysis for telemetry and AI, Leaderboards for GT-class comparisons.
Race Dashboard
Live lap timing, reference lap selection, delta bar, speed, and G-force in a cockpit-friendly layout.
Video Sessions
Video tab keeps recorded stints, overlay buttons, refresh/delete/open actions, and quick access to analysis.
Session Library
Track-day sessions with best lap, car/driver metadata, sharing, filters, and batch analysis entry.
Lap Cleanup
Expanded session review lets drivers keep valid laps, delete mistakes, and spot best/reference laps before analysis.
Leaderboards
Local and online rankings by class with best lap, vehicle, power-to-weight, and upload workflow.
AI Lap Ranking
Compare all laps, select reference laps, and launch AI analysis from the ranked lap table.
AI Model Selection
Choose from Fast-Car Neighbor, Racing Instructor, Racing Engineer, and F1 Engineer analysis modes.
2D Telemetry Map
Road Atlanta map overlays braking, acceleration, apex markers, speed, Long G, and Lat G traces.
3D Corner View
Google Maps 3D inspection focuses on a corner with IN/APEX/OUT markers and synchronized telemetry.
What G-Box Actually Does
Under the simple cockpit UI, G-Box handles the hard work: GPS timing, video sync, lap cleanup, class rankings and AI-ready session summaries.
Phone GPS, G-Box, RaceBox, VBOX, OBD
The app can use the phone, G-Box hardware, popular external GPS devices and available OBD data, then turns everything into the same lap map, speed trace and G-force review.
Onboard Video And Overlay
Back/front/dual camera recording is tied to the session clock. The exported package can carry raw videos, overlay videos, picture-in-picture output and telemetry for server-side composition.
Cleanup, Rankings, AI Evidence
Drivers can delete invalid laps, compare all laps from selected sessions, build theoretical best sectors, estimate GT class by power-to-weight, and send compact or full telemetry to AI analysis.
Leaderboards
Turn every HPDE session into a clean class ranking.
G-Box finds the best valid lap for each driver and car, groups results by track and class, and lets clubs or friends compare local and online results without spreadsheet work after a track day.
Best lap per participant
The app keeps one clean best result per driver/car combination, so a leaderboard stays readable instead of filling with duplicate laps.
Track-day classes
Overall, GT1, GT2, GT3 and GT4 filters make mixed HPDE groups easier to compare by pace and estimated power-to-weight.
Local first, online when ready
Review results privately on the phone, then send the leaderboard when the event or run group is ready to share.
TrackRoad Atlanta
Leader01:37.450
SourceLocal
Leaderboards
3 sessions processed · 2 best results
#1
Denis MalevanyiM3 · GT2 · 220 hp/t
01:37.450Best lap
#2
EricM3 · GT2 · 210 hp/t
01:40.950+3.500
The Web Viewer Mirrors Analysis
Telemetry exported from G-Box opens directly on the site. The browser viewer is not a separate toy: it follows the native analysis model with lap rebuilding, track map, playback cursor, Speed/Long G/Lat G graph and imported-file metadata.
Opens Real Track-Day Exports
Use the demo file, upload your own telemetry, or open session links generated from the library. VBO, CSV and normalized GBO data all land in the same review layout.
Track Line And Cursor
The route is colored by speed, start/finish is inferred like in the app, and the viewer keeps S/F, S2 and S3 layouts per track for repeat analysis.
Three Analysis Channels
Speed, Long G and Lat G can be toggled, zoomed and synchronized with the map, so a braking or exit mistake is visible as both a line on the circuit and a trace on the graph.
A Complete Data Loop, Not A Stopwatch
G-Box records, imports, normalizes and explains track data. The goal is to make every stint useful: the same session can become a local leaderboard entry, a browser viewer link, an overlay video and an AI coaching request.
Local-first session archive
Telemetry, laps, videos, metadata and invalid-lap decisions stay on the device first, then can be shared as a package or uploaded when needed.
Overlay and sharing pipeline
The session package includes manifest data, source file names and linked media so overlay rendering and later review remain traceable.
Native analysis in the browser
The site viewer opens telemetry, rebuilds laps with the native import rules, and makes analysis shareable without asking the driver to install the iPad app.
Ready For Track-Day Telemetry
Open the demo file, load G-Box telemetry, or calculate a leaderboard from your own track-day export.