SEE WHERE YOUR LAP TIME GOES
Created by a professional racing driver and instructor. Mount your iPhone, drive your session and get every lap timed, onboard video with telemetry and a corner-by-corner breakdown: where you braked too late and where you lost speed on exit.
VIDEO WORTH SHARING
Record with iPhone cameras or connect a GoPro. G-Box overlays lap time, speed, G-forces, track map and RPM on your video. Pick a race-car style dash or a vertical layout for social media. On supported iPhones, film both cameras at once: the road and the driver.
ALL ON ONE IPHONE
25 Hz Fusion combines the iPhone's GPS and motion sensors to calculate a smooth driving line between GPS fixes, with no external receiver. These are calculated positions, not 25 Hz satellite measurements; results depend on GPS reception and phone mounting.
Add a compatible OBD adapter for RPM, estimated gear and power, or an external GPS receiver: G-Box, RaceBox Mini, Mini S and Micro, and selected Dragy models.
COMPARE YOUR LAPS
• Automatic lap timing, live delta, sectors and predicted lap time
• Speed, G-forces, RPM and delta on synchronized graphs and map
• Braking, turn-in, apex and exit speed against your best lap
• Friction Circle and a theoretical best lap from your strongest sectors
• Session replay on 2D and 3D maps
YOUR DATA, YOUR WAY
Import sessions from RaceChrono, Harry's LapTimer, VBOX, Race Navigator, MoTeC and AiM. Export to GBO, CSV, VBO, GPX and NMEA.
TRY IT BEFORE YOUR TRACK DAY
Open the included Nürburgring Nordschleife demo lap (8:06) to explore maps, graphs and lap timing before your first session.
YOUR FIRST TRACK DAY WITH PRO
Your first 3 sessions with laps are recorded with full G-Box Pro and stay unlocked for good: video, overlays, lap comparison and corner analysis. Sessions without laps don't count.
FREE AND PRO
Free: lap timing with iPhone GPS, map and speed graph, session import, OBD logging.
G-Box Pro: 25 Hz Fusion, video recording and overlays, lap comparison, all telemetry channels, corner analysis, OBD power and external GPS receivers. Choose a monthly or annual subscription (the annual plan starts with a free month for eligible new subscribers) or a one-time Lifetime purchase. AI analysis uses separate credits.
Location access is required for GPS lap timing. For closed race tracks only. Set up your phone before driving and never operate it while driving.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Comparing laps makes it easy to spot mistakes and improve my driving with every session.
Highly Recommended
Артём Топ игрок
A must-have app for anyone serious about improving lap times and becoming a more consistent driver.
• Updated leaderboard design with clearer driver names.
• Refined font sizes and removed unnecessary divider lines.
• Simplified editing of session details.
• Improved power estimation when OBD data has brief gaps.
Version 2.7.4
The developer, RaceMeasure LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Contact Info
Identifiers
Usage Data
Diagnostics
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
RaceMeasure LLC
Size
64.4 MB
Category
Sports
Compatibility
Requires iOS 17.0 or later.
iPhone Requires iOS 17.0 or later.
Mac Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.