G-Box Lap Timer for iPhone
Onboard video with your data on it
Record the road and yourself at the same time, with lap time, speed, g-force and the track map on the video. Fusion adds a smooth 25 Hz line without an external GPS.
Free to download. Your first 3 sessions with laps are recorded with full Pro.
Road and driver, filmed at the same time Pro
G-Box films the road ahead and the driver at the same time, using both iPhone cameras. Lap time, speed, g-force, the track map and RPM (with OBD) go onto the video. GoPro footage works too.
- Several overlay styles, including a sports-car dash
- Vertical format for social media
- Made on the phone. No PC, no RaceRender.
Fusion: a 25 Hz line from the phone alone Pro
iPhone GPS records about one point per second. That is fine for lap times, but not enough to see the shape of a corner.
In Fusion mode G-Box combines GPS with the iPhone's motion sensors and draws your line at 25 Hz, close to what a RaceBox shows, without an external receiver. Try it on your next session and compare.
The points between GPS fixes are calculated from the motion sensors, not measured by satellites 25 times a second.
See where you lose time, corner by corner Pro
G-Box compares braking, entry, apex and exit in every corner with your best lap, on synced graphs and the map.
You also get the friction circle, a theoretical best lap and a 2D or 3D replay.
Who builds G-Box
I'm Denis Malevanyi. I have coached drivers at the Nürburgring since 2009. Before that I raced Time Trial in the US and finished 2nd in TTB at the 2008 NASA Championships, and in 2009 I took a class podium in VLN.
Over the years I used Traqmate, Harry's LapTimer with RaceRender on a PC, and RaceChrono. G-Box is the tool I wanted at the track: video, data and corner analysis in one phone.
Data helps most once you drive close to the limit. Then compare with a fast reference lap in the same car, on the same day.
I keep improving the app. If something is wrong or missing, write to me directly: denis@racemeasureapp.com
Denis
Also in G-Box
- Lap timing
- Automatic start and finish, sectors, live delta and predicted lap time.
- Import and export
- Bring your sessions from RaceChrono, Harry's LapTimer, AiM, VBOX, MoTeC and Race Navigator. Export to GBO, CSV, VBO, GPX and NMEA.
- External GPS and OBD
- Works with RaceBox Mini, Mini S and Micro, and selected Dragy models. OBD adds RPM, estimated gear and power from your pulls.
- Classes
- An automatic class from GT4 up to SPORT, based on power-to-weight and tire grip, so friends can race the clock in comparable classes. In the app, tap a result to see why a car is in its class. Online leaderboards
- Shared laps
- Open real Nordschleife laps from the G-Box server, including the developer's own. Share yours publicly or by private link.
- Web viewer
- Open a session in any browser with the map and graphs. The person you send it to does not need the app. Open the viewer
Start free
G-Box is free to download. Your first 3 sessions with laps are recorded with full Pro, and they stay open for good.
Free
- Lap timing with iPhone GPS
- Track map and speed graph
- Import from other apps
- OBD recording
Pro
- Fusion 25 Hz
- Video with overlays
- Lap comparison and corner analysis
- All data channels
- OBD power
- External GPS receivers
Pro is bought in the app. Prices are shown in the App Store and differ by country.
iPhone
Available now on the App Store.
Download on the App StoreA Nordschleife demo lap (8:06) is built in, so you can look around before your first session.
Android
The Android version is in free closed testing and does almost everything the iPhone version does, including publishing your results. To join:
Open both links with the same Google account.
- Use G-Box on closed tracks only, and set up the phone before you drive.
- G-Box classes are the app's own system, not an official classification of any racing series.