GPS Race Timer vs MG Flasher
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GPS Race Timer
Accurately measure vehicle acceleration times like 0-60 mph and 1/4 mile using your iPhone's GPS. Set up timers beforehand and let the app automatically start measurements when speed targets are met or motion is detected. Save, export, and transfer your performance data easily.
- Measure 0-60 mph, 60-120 mph, 1/4 mile
- Automatic start detection
- Save and export results
- Preset and adjustable timers
- No extra hardware required
- Optional PRO version features
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Measure acceleration times such as 0–60 mph, 60–120 mph and 1/4 mile directly with your iPhone — accurately and without extra hardware. The app is designed so it doesn’t need to be operated while driving; you just set everything up beforehand while stationary. Measurements then start automatically — when the target speed is reached or when a start is detected. You can save results locally on your iPhone and, if needed, export them or transfer them to other devices. Preset timers: 60 ft, 1/8 mile, 1/4 mile, 1/2 mile, 1 mile, 0 – 60 mph, 0 – 120 mph, 50 – 75 mph, 60 – 120 mph, 0 – 100 km/h, 0 – 200 km/h, 80 – 120 km/h, 100 – 200 km/h. All timers are, of course, fully adjustable. The free version measures up to two times per run. How to use the app: Check the timer settings on the start screen. If everything looks good, place your iPhone in the car where it has good GPS reception and is held securely, then start the acceleration test. You can adjust the timer configuration in the Settings screen (just tap the relevant timer). Then return to the race screen and follow the previous instruction. Optional PRO version (in-app purchase): 1. Up to four timers in parallel (instead of two) 2. Precise determination of elevation differences 3. Simulation of a Sportsman start and reaction-time measurement 4. No ad banners
MG Flasher
This app allows for advanced ECU tuning and feature unlocking for specific BMW and Supra engines via OBD and Wi-Fi. It offers on-the-fly map switching, custom options, flex fuel integration, and diagnostic capabilities for enhanced vehicle performance. Designed for off-road use only.
- Custom performance modifications
- Switchable maps on-the-fly
- Dynamic exhaust burble control
- Flex fuel integration
- Torque limiter adjustment
- Speed limit removal
- Diagnostic DTC reading/clearing
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MG Flasher is a mobile tuning App designed for BMW/Supra vehicles equipped with B48, B58, S58, N63, S63, and N74 engines. Flashing is done by OBD using ENET Wi-Fi. Flashing time on ENET is only 15 - 20 seconds! Disclaimer: For off-road use only. *Initial flash/ECU unlock with ENET Wifi will take approximately 4 - 6 minutes. Flashing your BMW with MG Flasher unlocks many features: • Custom Options - pick and choose performance mods, exhaust, cooling, torque options, as well as custom code options + more. • Switchable Maps On-The-Fly - WORLD'S FIRST SOLUTION FOR BMW B58/B48 - through a simple combination of cruise control buttons you can quickly select between mapping, without the need to reflash the vehicle! Currently available for gen 1 and 2 B48,B58 and S58. • Dynamic Exhaust Burble On-The-Fly - via a simple combination of cruise control buttons you can change the intensity of the burbles whenever you like! Currently available for gen 1 and 2 B48,B58 and S58. • Flex Fuel - Automatically adjusts engine calibration to any ethanol blend, with smart blending logic for smooth power delivery and full integration with sensor or manual override control. Live ethanol display, cruise-control adjustability, and instant cluster feedback. • Max Cooling On-The-Fly - With a simple cruise control button combination sequence, you can enable the option without reflashing the car! Currently available for gen 1 and 2 B48,B58 and S58. • Torque Limit Adjustability - TCU 8HP Limiter Lifted for all platforms! Software calibration without the need for any transmission tuning or skewing the torque/load calculation model maps. This allows for accurate calculations, smooth shifting and no software trickery. • Speed Limit Removal, Startup Roar, Torque by Gear Limiter available on select software • Sport Gauges (HP and TQ) adjustable by user! • OTS maps prepared by MG Flasher tuners • Custom maps flashing – flash custom maps prepared by us or other tuners/users • Logger - log real time data and plot it into graphs for troubleshooting and optimizing • Cloud Log Viewer - Professional log viewing on logs.mgflasher.com • Diagnostic - Read and clear BMW specific DTC's • Reset various adaptations, restore coding • CVN number (Checksum Verification Number) along with flashing counter stays untouched. This means our software will be virtually invisible to dealer level diagnostic tools Supported vehicles: BMW M140i/120i/125i/M135i F20/F21/F40 BMW M240i/220i/225i/230i/228i/M235i - F22/F23/F44 BMW M340i/318i/320i/330i/330e - F30/F31/F34/G20/G21/G28 BMW M3 - G80 BMW M440i/420i/430i - F32/F33/F36/G22 BMW M4 - G82 BMW 540i/520i/530i/530e - G30/G31/G38 BMW M550i G30 BMW M5 LCI - F90 BMW 640i/630i - G32 BMW 740i/740Li/730i/730Li/740e/740Le - G11/G12 BMW 840i, M850i - G14/G15/G16 BMW M8 - F91, F92, F93 BMW X1 20i/25i/28i -F48 BMW X2 20i/25i/28i/M35i - F39 BMW X3 M40i/20i/30i - G01 BMW X4 M40i/20i/30i - G02 BMW X3M/X4M - F97/F98 BMW X5 40i,50i - G05 BMW X6 40i - G06 BMW X5M/X6M - F95/F96
Screenshots
Verdict
GPS Race Timer and MG Flasher both sit at 4.5 stars, but that hides the real split: 71% of MG Flasher's written reviews are positive against 34% of GPS Race Timer's. MG Flasher also leads on in-app purchases (none vs 1) and ads (none vs shown). GPS Race Timer's advantage is ratings volume (2.7K vs 89) and iOS requirement (12.2 vs 15.4). On price, rating and device support 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. GPS Race Timer sells 1 one-off in-app purchase. MG Flasher asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.5 for GPS Race Timer against 4.5 for MG Flasher. That said, the two scores are not equally well evidenced: GPS Race Timer has 2.7K ratings behind it against 89, so its average is the more settled of the two. Written reviews are what separate them: 34% of GPS Race Timer's written reviews are positive against 71% of MG Flasher's.
GPS Race Timer ships an update every 7 months, MG Flasher every 9 days. The most recent releases landed on October 11, 2026 and October 8, 2026 respectively.
| Parameter | GPS Race Timer | MG Flasher |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (2.7K ratings) | 4.5 (89 ratings) — better |
| Positive reviews | 34.4% of reviews | 71.4% of reviews — better |
| Number of ratings | 2.7K — better | 89 |
| Update frequency | Every 7 months | Every 9 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.2 — better | 15.4 |
| Further details — not scored | ||
| Size | 50 MB | 748 MB |
| Age rating | 4+ | 4+ |
| Developer | Thomas Hagenau | JR Auto Performance Inc. |
Customer experience
GPS Race Timer
MG Flasher
Bugs and requests
GPS Race Timer
Reported bugs
4 issues- Timer doesn't reset properly
- App crashes on startup
- Significant GPS/speed detection delays
- Recorded times do not match actual performance
Requested features
4 requests- Add 60ft and 1/8 mile times
- Automatic start/stop of timer
- Manual start option for timer
- Improved accuracy and consistency
MG Flasher
Not enough reviews yet to summarise bugs or requests.
In-app purchases
GPS Race Timer
- PRO$4.99
MG Flasher
No in-app purchases
