# G-Box Lap Timer: Track Days — Track Day Telemetry & Video > iPhone GPS lap timer, telemetry logger, and driving coach for track days. (iPhone/iPad app by RaceMeasure LLC.) - Source: https://appshunter.io/ios/app/g-box-lap-timer-track-days/id6791293869 (this page in markdown: same URL + `.md`) - Developer: [RaceMeasure LLC](https://appshunter.io/developer/6791293871) - Category: Sports - Price: Free with in-app purchases - Rating: 5.00/5 from 2 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 17.0 · 61 MB - Languages: Russian, American English, European Spanish, German (Germany), French (France), Japanese - Released: 2026-08-03 - Data updated: 2026-10-25 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/g-box-lap-timer-track-days/id6791293869/reviews.md ## What is G? 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/ ## Key features - Automatic GPS lap timing - Live sector and delta analysis - Speed and G-force telemetry - Friction circle visualization - Lap comparison and analysis - Onboard video with telemetry overlay ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | G-Box Pro Monthly | $4.99 | per month | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | G-Box Pro Lifetime | $19.99 | one-time | | 500 AI Credits | $4.99 | one-time | | 1,000 AI Credits | $9.99 | one-time | | 2,500 AI Credits | $24.99 | one-time | ## Is G safe? Not enough ratings yet to assess G. ## Is G legit? G-Box Lap Timer: Track Days appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for G is 65 out of 100 points across 7 verification signals from App Store and developer data. ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/g-box-lap-timer-track-days/id6791293869/reviews.md ### 5/5 — Easy to improve *2026-08-05* Comparing laps makes it easy to spot mistakes and improve my driving with every session. ### 5/5 — Highly Recommended *2026-08-04* A must-have app for anyone serious about improving lap times and becoming a more consistent driver. ## Frequently asked questions about G ### What is G-Box Lap Timer used for? G-Box Lap Timer turns your iPhone into a GPS lap timer, telemetry logger, and driving coach. It's designed for track days, HPDE, open lapping, and time attack to help drivers analyze their performance and find areas for improvement. ### What kind of data does G-Box Lap Timer provide? It provides synchronized speed, longitudinal G, and lateral G data with your position on track. You can also view telemetry traces for braking zones, turn-in, apex, and track-out, along with a friction circle to assess tire grip utilization. ### Can G-Box Lap Timer record video? Yes, G-Box Lap Timer allows you to record onboard video with a clean telemetry overlay. This feature helps you visualize your performance data in conjunction with your driving. ### Does G-Box Lap Timer support external devices? Yes, the app supports compatible external GPS and OBD data sources. This allows for more comprehensive data logging and analysis during your track sessions. ### How does G-Box Lap Timer help drivers improve? It helps drivers break down every corner by comparing selected laps with the strongest lap of the session. You can review braking points, entry and exit speeds, and identify opportunities to improve throttle application and steering inputs. ### Is G-Box Lap Timer available on Android? Based on the provided data, G-Box Lap Timer is currently only supported on iPhone. It is designed to work with iOS devices. ### How often is G-Box Lap Timer updated? The latest version of G-Box Lap Timer is 1.1, which was last updated on August 5, 2026. This indicates a recent update, suggesting ongoing development and support. ### Does G-Box Lap Timer have ads? No, G-Box Lap Timer does not contain advertisements. The app is free to download and use without any ad interruptions. ## Version history (last 5 releases) ### 2.7.5 — 2026-10-21 • Fixed overlay handling for dual-camera recordings. • Improved the front-camera control so you can choose one or both cameras in your video. ### 2.7.4 — 2026-10-16 • 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. ### 2.7.3 — 2026-10-12 • Enter coordinates from Google Maps to place starts, finishes and sector boundaries. • Improved track editing and timing on point-to-point routes. • Fixed issues when processing sessions with poor GPS reception. ### 2.7.2 — 2026-10-12 • Choose your custom tracks and point-to-point sectors when editing an imported session. • Improved nearby custom track selection. • Fixed saving the selected track and its start and finish positions when reopening and exporting a session. ### 2.7.1 — 2026-10-11 • Share sessions through the G-Box server. In the export menu, choose “Send to G-Box server”. Send a whole session or a single lap, with video or telemetry only, then choose who can see it: with a private link, only the people you send it to; public, all G-Box drivers in the track’s list. Sessions are kept on the server for 360 days. • Sessions from other drivers: in Load sessions, choose “From G-Box server”. Open a link you received or browse a track’s public sessions, the fastest and the newest, and download them to the app. • Large sessions with video upload faster and more reliably. • More accurate OBD power: it is now measured on full-throttle pulls. • More stable OBD adapter connection during a session. • More accurate gear detection. ## Apps similar to G | App | Rating | Price | Category | | --- | --- | --- | --- | | [ApexLap: Lap Timer & Telemetry](https://appshunter.io/ios/app/apexlap-lap-timer-and-telemetry/id6782556737) | 5.0 (1) | Free | Sports | | [Trakio](https://appshunter.io/ios/app/trakio/id6760278416) | — | Free | Sports | | [Freelogic WiFi Middle App](https://appshunter.io/ios/app/freelogic-wifi-middle-app/id6747007375) | — | Free | Sports | | [Karting Lap Timer: WinLap](https://appshunter.io/ios/app/karting-lap-timer-winlap/id6771492670) | — | Free | Sports | | [OnRace](https://appshunter.io/ios/app/onrace/id6755437647) | — | Free | Sports | | [TIMEHUNTERS](https://appshunter.io/ios/app/timehunters/id6443865138) | — | Free | Sports | ## More apps by RaceMeasure LLC - [Poker Anywhere: Hold’em](https://appshunter.io/ios/app/poker-anywhere-holdem/id6796505743) - [G-Box Dyno](https://appshunter.io/ios/app/g-box-dyno/id6806042080) - [EasyScan: OBD2 Car Scanner](https://appshunter.io/ios/app/easyscan-obd2-car-scanner/id6816870332) All apps by RaceMeasure LLC: https://appshunter.io/developer/6791293871 ## Related topics [boxcar racing](https://appshunter.io/ios/topics/boxcar-racing) · [gbox](https://appshunter.io/ios/topics/gbox) · [laps](https://appshunter.io/ios/topics/laps) · [racing timer](https://appshunter.io/ios/topics/racing-timer) · [track days](https://appshunter.io/ios/topics/track-days) · [race track timer](https://appshunter.io/ios/topics/race-track-timer) · [crossbox lap timing](https://appshunter.io/ios/topics/crossbox-lap-timing) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-25.*