# G-Box Lap Timer — Lap Timer & Driving Coach > 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/id6791293869 (this page in markdown: same URL + `.md`) - Developer: [RaceMeasure LLC](https://appshunter.io/developer/6791293871) - Category: Sports - Price: Free - Rating: 5.00/5 from 2 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 17.0 · 44 MB - Languages: Russian, American English, German (Germany), French (France) - Released: 2026-08-03 - Data updated: 2026-08-24 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/g-box-lap-timer/id6791293869/reviews.md ## What is G? G-Box Lap Timer is more than a stopwatch. It combines GPS lap timing, multi-source telemetry, synchronized video and driver coaching in one track-day tool. Record a fresh session or import a lap from another logger, then turn the data into decisions for your next stint. TIME EVERY STINT • Automatic GPS lap timing with current, previous and best lap • Live delta and sectors show where the lap is won or lost • Build or load your own circuits and organize every run • Choose metric or imperial units CONNECT THE HARDWARE YOU ALREADY OWN • Use iPhone GPS or a compatible external receiver over Bluetooth LE or Wi-Fi • Support includes G-Box, RaceBox Mini, Mini S and Micro, plus selected Dragy receivers • Read compatible OBD speed and RPM channels for richer telemetry and overlays BRING YOUR OWN TELEMETRY G-Box can analyze much more than sessions recorded inside the app. Import telemetry from RaceChrono, Harry’s LapTimer, VBOX, Race Navigator, MoTeC and AiM, plus GBO, CSV, VBO, GPX, KML and NMEA files. Load a lap from another system, select a reference and continue the analysis on your iPhone. SEE WHERE THE TIME WENT • Speed, longitudinal G, lateral G, RPM, delta and track position stay synchronized • Compare two laps on the same distance-based graph and map • Inspect braking zones, turn-in, apex speed, track-out and exit speed • Use the Friction Circle to see how effectively the available tire grip is being used • Build a theoretical best lap from the strongest parts of the session COACHING, NOT JUST CHARTS G-Box evaluates the driving behind the numbers. Corner-by-corner analysis looks at brake application, brake release, trail braking, rotation, apex and acceleration on exit. It turns telemetry into clear coaching points for a newcomer building consistency and an experienced driver hunting the final tenth. Optional AI analysis adds another independent reading of the telemetry. VIDEO THAT FOLLOWS THE LAP • Record with the iPhone cameras or connect a GoPro • Synchronize GoPro time, browse clips and import only the video you need • Match any video to any telemetry session by marking the lap start • Watch two laps side by side or stacked while the telemetry follows playback • Export a clean video overlay with lap time, speed, G-forces, track map, RPM and instrument layouts ONE TRACK-DAY WORKFLOW Keep sessions, laps, cars and tracks together. Compare runs, review the map and graphs, share eligible results to leaderboards and return to the next stint with a plan. Location access is required for lap timing and telemetry. Use G-Box only on a closed race track and never operate the phone while driving. Some hardware, import, video, Pro and AI features depend on compatibility, subscription or credits. 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 ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/g-box-lap-timer/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) ### 2.1 — 2026-08-24 • Added GPS-derived lateral and longitudinal G with a Sensors/GPS selector for graphs. • Restored App Store availability for G-Box Pro Monthly, Annual, Lifetime, and AI credit packs. • Improved purchase catalog loading and overall stability. ### 2.0 — 2026-08-20 • Refined the transparent Race HUD overlay: cleaner lap and delta panels, revised gauges, and speed fallback when RPM is unavailable. • Fixed GoPro video import, time synchronization, session linking, and black-video overlay exports. • Overlay actions now show Link until a valid video is attached, then switch to Overlay. • Video output now follows the selected camera and telemetry configuration. • Improved Bluetooth discovery, overlay previews, unit handling, and overall stability. ### 1.6 — 2026-08-15 • New users now get 30 days of full access to every G-Box feature. • Added OBD speed and RPM telemetry, including an RPM graph. • Added independent smoothing controls for speed, RPM, lateral G and longitudinal G. • Telemetry recording is now independent of GPS update quality, with selectable recording rates. • Faster graph loading with progress feedback, plus improved GBO import and leaderboard reliability. ### 1.5 — 2026-08-14 • Added new motorsport dashboard styles for video overlays. • Added adjustable dashboard size and horizontal position. • Improved RPM, brake and throttle visualization with smoother animation and adaptive RPM scaling. • Improved dual-camera recording and overlay stability. • Fixed layout and alignment issues across dashboard overlays. ### 1.4 — 2026-08-11 • Added OBD-II connections over Bluetooth Low Energy and local Wi-Fi. • Added optional OBD vehicle speed for telemetry recording. • Improved Settings readability with larger small text. • Improved Leaderboards connection handling when the device is offline. ## More apps by RaceMeasure LLC - [Poker Anywhere: Hold’em](https://appshunter.io/ios/app/poker-anywhere-holdem/id6796505743) All apps by RaceMeasure LLC: https://appshunter.io/developer/6791293871 ## Related topics [gbox](https://appshunter.io/ios/topics/gbox) --- *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 2026-08-24.*