G vs Race Telemetry Studio
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
G
This app transforms your iPhone into a GPS lap timer and driving coach. Analyze your performance with detailed telemetry, compare laps, and identify areas for improvement to shave seconds off your track times.
- 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
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WHERE YOU LOSE TIME — A G-BOX SIGNATURE FEATURE Open a lap and G-Box shows on the map which corners cost you time and how many tenths. No digging through telemetry graphs: it's fully automatic, right on your iPhone. Works with G-Box recordings and sessions from RaceChrono, AiM, MoTeC, TraqMate or Race Navigator. The benchmark is your own car on your own tires: the best pass through each corner from that car's fast laps (within 3.5% of the best) on the same track that day — not someone else's record. Tap a marker for the cause in plain words (braking too early, a slow exit) and what to do on the next lap. "Compare with lap N" puts the faster lap on the graph and map in one tap. Created by a professional racing driver and instructor. 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, such as OBDLink MX+, 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 • Every corner in one table: this lap, the day's best pass and the difference in braking, turn-in, apex and exit speed • Speed, G-forces, RPM and delta on synchronized graphs and map, against any lap from any session on the same track • Friction Circle and a theoretical best lap from your strongest sectors • Car class from power-to-weight and tire grip: performance points, SPORT to GT4, and leaderboards by track • Session replay on 2D and 3D maps YOUR DATA, YOUR WAY Import sessions from RaceChrono, Harry's LapTimer, VBOX, Race Navigator, MoTeC, AiM and TraqMate. 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: where you lose time, video, overlays and lap comparison. Sessions without laps don't count. FREE AND PRO Free: lap timing with iPhone GPS, map and speed graph, session import, OBD logging, and a preview of the analysis: how much time you could gain and in which corners. G-Box Pro: the full analysis with time lost per corner, causes and tips, 25 Hz Fusion, video recording and overlays, lap comparison, all telemetry channels, OBD power and external GPS receivers. Pro is a one-time purchase, not a subscription, and includes 1,000 credits for AI analysis. More AI credits are available in separate packs. 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/
Race Telemetry Studio
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Race Telemetry Studio is a high-performance telemetry analysis and video overlay engine designed for race drivers, track day enthusiasts, and motorsport fans. Whether you use professional VBOX or AiM loggers, or portable Dragy and RaceChrono apps, Race Telemetry Studio seamlessly imports your data, visualizes throttle/brake inputs, plots driving lines on interactive track maps, and exports stunning 4K videos with dynamic gauge overlays. Key Features: Universal Format Support: Native import for .vbo (VBOX), .dlap (Dragy), .xrk / .bmo (AiM Solo / SmartyCam), and .rcz (RaceChrono). 60FPS Hardware Accelerated Engine: Powered by Apple Native Canvas hardware decoding for butter-smooth multi-stream 4K playback and instant seeking. Dynamic Gauge HUD Overlays: Real-time rendering of Tachometer (RPM), Speed, Throttle/Brake bar, Gear indicator, Steering wheel angle, and G-Force meters. Smart auto-hiding for missing channels. Track Map Trajectory Heatmap: Dynamic racing line coloring by Throttle/Brake pedals, Longitudinal G, or Speed spectrum to locate exact braking zones and apexes. Ideal Lap Video Stitching: Automatically combines your best sectors to build a seamless Ideal Lap playback and video export. Picture-in-Picture (PiP) Dual Video Comparison: Smart GPS auto-alignment for side-by-side telemetry and video comparisons. 4K Hardware Video Export: Fast export with WebCodecs hardware acceleration, customizable HUD layout, audio remuxing, and file format cross-conversion.
Screenshots
Verdict
The clearest difference is device support: Race Telemetry Studio at 4 against G's 1. Race Telemetry Studio also leads on iOS requirement (15.1 vs 17.0). On price, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. G sells 5 in-app purchases, starting at $4.99 per month and Race Telemetry Studio sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
| Parameter | G | Race Telemetry Studio |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 4 days | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 17.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 63 MB | 33 MB |
| Age rating | 4+ | 9+ |
| Developer | RaceMeasure LLC | 伟雄 林 |
In-app purchases
G
- G-Box Pro Monthly$4.991 Month
- 500 AI Credits$4.99
- 1,000 AI Credits$9.99
- G-Box Pro Lifetime$19.99
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- 2,500 AI Credits$24.99
Race Telemetry Studio
- AI Credit * 100$14.99
- Pro Member$29.99









