Comparison

bootmod3 vs GPS Race Timer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

bootmod3

This platform enables users to unlock the full performance potential of their BMW, Mini, and Toyota Supra vehicles by flashing the factory ECU and TCU. It offers features like map switching, flex fuel tuning, and anti-lag, allowing for significant horsepower gains and custom performance adjustments.

Highlights
  • ECU and TCU flashing
  • Map switching via steering wheel
  • Flex Fuel tuning
  • Anti-Lag functionality
  • Live monitoring and datalogging
  • Customizable map editor
Features
Read full description

bootmod3 is the First and Most Widely Adopted flash tuning platform for the BMW F and G series vehicles and the new A90/A91 Toyota Supra. Map Switching using steering wheel, Flex Fuel Tuning, Anti-Lag, Ethanol Content Checking on the RPM gauge in the dash, and more.. *** All New Map Editor! Connect an ENET cable to your iOS device or use the bootmod3 WiFi Adapter for any programming, dashboard, datalogging and diagnostics. bootmod3 allows end users to unleash the full performance potential of their BMW while doing so as the factory intended by programming the factory engine control unit (ECU/DME) and transmission (TCU, where applicable) over the OBD diagnostic port. Program your car and gain 70-120hp in just 3minutes with an off the shelf tune. Switch among pump gas and race gas maps in just seconds. CustomROM Features available for most vehicles supported: - Map switching using steering wheel cruise control buttons, switching entire calibration tables right inside the factory DME - Flex fuel functionality integrating a Flex Fuel Sensor - Antilag functionality to build boost off the line or while rolling - Live adjust screens for adjusting exhaust burble on the fly without re-flashing using a simple slider control in the app - In-Dash Ethanol content check on the RPM gauge using cruise buttons on the steering wheel (e.g. 1500rpm = 15% ethanol, 6000rpm = 60% ethanol) /// OTS maps Load pre-made performance tunes for your vehicle /// CUSTOM TUNING Customize the performance tuning on your DME / ECU using our custom tuning interface. Tailor performance, sound, fuel economy to your specific needs. Flash the transmission with GTS software on supported models. /// Live Monitoring Monitor your engine behaviour using a configurable gauges layout to keep on eye on any of the hundreds of engine monitors internal to the ECU including BMW specific logging channels and RAM variables. Monitor torque limits, boost, ignition timing, variable valve timing, fuel targets, fuel trims, across all cylinders, etc. /// Cloud Enabled Cloud services allow for datalogs and maps to be stored in one central location and access from any location /// FEATURES For feature descriptions please refer to our website for each particular vehicle you're interested in tuning using the bootmod3 platform. Supported vehicles: Bosch MEVD17.2 DME Vehicles: F8x M3, M4 F2x F3x 135i, 235i, 335i, 435i F1x 535i, 640i, M5, M6, 550i, 650i, X5, X6 F87 M2, M2 Competition F4x X4, X4M F8x X5M, X6M Bosch MG1 DME Vehicles: F2x 2015 - 2019 M140i F2x 2016 - 2019 M240i F3x 2015 - 2018 340i F3x 2016 - 2019 440i G3x 2017+ 540i GT G32 2017+ 640i G1x F0x 2015+ 740i G01 2017+ X3 M40i G02 2018+ X4 M40i G8x M3/M4 G9x X3M/X4M 2020+ A90/A91 Toyota Supra * This racing product is for competition closed course use only. ** Use of this software may void portions of your vehicle’s factory warranty. Some items may not be legal for “on highway use”. bootmod3 makes no guarantees to the legality of any parts used for “on highway vehicles” and accepts no responsibility for compliance with the vehicle’s factory warranty.

About

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.

Highlights
  • 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
Read full description

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

Screenshots

bootmod34 screens
GPS Race Timer4 screens

Verdict

The call

The clearest difference is review sentiment: bootmod3 at 70% against GPS Race Timer's 35%. bootmod3 also leads on in-app purchases (none vs 1) and ads (none vs shown). GPS Race Timer's advantage is iOS requirement (12.2 vs 15.0). On price, ratings volume 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. GPS Race Timer sells 1 one-off in-app purchase. bootmod3 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

bootmod3 holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 1.7K and 2.7K respectively. Written reviews point the same way: 70% of bootmod3's written reviews are positive against 35% of GPS Race Timer's.

UpkeepUpdate frequency

bootmod3 ships an update every 4 days, GPS Race Timer every 7 months. The most recent releases landed on September 24, 2026 and September 20, 2026 respectively.

Scorecard7 real differences · 3 level
bootmod3 versus GPS Race Timer: the parameters behind the verdict, then further details
Parameterbootmod3GPS Race Timer
PriceFreeFree
Rating4.8 (1.7K ratings) — better4.5 (2.7K ratings)
Positive reviews70.0% of reviews — better34.7% of reviews
Number of ratings1.7K2.7K — better
Update frequencyEvery 4 days — betterEvery 7 months
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.012.2 — better
Further details — not scored
Size151 MB50 MB
Age rating4+4+
DeveloperPRO TUNING FREAKS INC.Thomas Hagenau

Customer experience

bootmod3

All ratings1,669 ratings
Positive96.0%
Neutral1.1%
Negative2.9%
Written reviews200 reviews
Positive70.0%
Neutral6.0%
Negative24.0%

GPS Race Timer

All ratings2,612 ratings
Positive87.1%
Neutral4.7%
Negative8.2%
Written reviews124 reviews
Positive34.7%
Neutral4.0%
Negative61.3%

User reviews

bootmod3

From 1.7K App Store ratings

What we love

  • 👍 Easy to use app
  • 🚀 Fast flashing and tuning
  • 💪 Excellent performance gains
  • 🔧 Great customization and tuning options
  • ⭐ Fantastic customer support

Room to improve

  • 🐛 Occasional connectivity issues
  • 🔍 Difficulty with certain features (e.g. burbles, code clearing)
  • 🤔 Compatibility problems with newer iOS versions
  • 🧰 Concerns about bricking ECU

GPS Race Timer

From 2.7K App Store ratings

What we love

  • 👍 Simple and easy to use
  • 🚀 Accurate speed tracking
  • 💡 Customizable settings
  • 📊 Saves run data

Room to improve

  • 🐛 Inconsistent 0-60 and quarter mile times
  • 🐛 Fails to start/record runs
  • 🐛 Inaccurate distance tracking
  • 🐛 Compatibility issues with newer devices

Bugs and requests

bootmod3

Reported bugs

3 issues
  • App crashes or freezes after updates
  • Inability to connect to car after iOS updates
  • Trouble with flashing and tune loading

Requested features

4 requests
  • Add support for more BMW models
  • Improve app UI/UX for better usability
  • Expand customization options (e.g. cold start, map selection)
  • Enhance data logging and diagnostics

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

In-app purchases

None

bootmod3

No in-app purchases

1 purchases

GPS Race Timer

One-time1
  • PRO$4.99

Questions

Is bootmod3 free?
bootmod3 is free to download, with no in-app purchases.
Is GPS Race Timer free?
GPS Race Timer is free to download, with in-app purchases available.
Which has better reviews, bootmod3 or GPS Race Timer?
bootmod3 is rated higher. bootmod3 averages 4.8 out of 5 from 1.7K ratings, while GPS Race Timer averages 4.5 from 2.7K ratings.
Do bootmod3 or GPS Race Timer have ads?
GPS Race Timer shows ads; bootmod3 does not.
Which is updated more often, bootmod3 or GPS Race Timer?
bootmod3 ships an update every 4 days, and GPS Race Timer every 7 months. Most recently, bootmod3 was updated on September 24, 2026 and GPS Race Timer on September 20, 2026.

Other comparisons