Comparison

bootmod3 vs GAP Flasher

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

GAP Flasher

This utility app enables communication with specific hardware devices through a user-friendly Bluetooth interface. It simplifies device operation for users with compatible hardware.

Highlights
  • Bluetooth communication
  • Device operation
  • User-friendly interface
  • GAP Flasher hardware compatible
Features
Read full description

GAP Flasher allows communication with any device based on the GAP Flasher hardware. It provides a friendly user interface to operate the device via Bluetooth.

Screenshots

bootmod34 screens
GAP Flasher1 screens

Verdict

The call

The clearest difference is monetization model: GAP Flasher at free against bootmod3's paid. GAP Flasher also leads on iOS requirement (9.0 vs 15.0). bootmod3's advantage is ratings volume (1.7K vs 5) and update cadence (every 4 days vs fortnightly). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

bootmod3 holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: bootmod3 has 1.7K ratings behind it against 5, so its average is the more settled of the two.

UpkeepUpdate frequency

bootmod3 ships an update every 4 days, GAP Flasher fortnightly. The most recent releases landed on September 24, 2026 and September 9, 2026 respectively.

Scorecard5 real differences · 5 level
bootmod3 versus GAP Flasher: the parameters behind the verdict, then further details
Parameterbootmod3GAP Flasher
PriceFreeFree
Rating4.8 (1.7K ratings) — better4.6 (5 ratings)
Positive reviews70.0% of reviews—
Number of ratings1.7K — better5
Update frequencyEvery 4 days — betterFortnightly
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.09.0 — better
Further details — not scored
Size151 MB41 MB
Age rating4+4+
DeveloperPRO TUNING FREAKS INC.GAP Innovation

Customer experience

bootmod3

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

GAP Flasher

All ratings5 ratings
Positive80.0%
Neutral20.0%
Negative0.0%

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

GAP Flasher

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

bootmod3

No in-app purchases

None

GAP Flasher

No in-app purchases

Questions

Is bootmod3 free?
bootmod3 is free to download, with no in-app purchases.
Is GAP Flasher free?
GAP Flasher is free to download, with no in-app purchases.
Which has better reviews, bootmod3 or GAP Flasher?
bootmod3 is rated higher. bootmod3 averages 4.8 out of 5 from 1.7K ratings, while GAP Flasher averages 4.6 from 5 ratings.
Do bootmod3 or GAP Flasher have ads?
Neither bootmod3 nor GAP Flasher shows ads.
Which is updated more often, bootmod3 or GAP Flasher?
bootmod3 ships an update every 4 days, and GAP Flasher fortnightly. Most recently, bootmod3 was updated on September 24, 2026 and GAP Flasher on September 9, 2026.

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