bootmod3 vs Flagger
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- ECU and TCU flashing
- Map switching via steering wheel
- Flex Fuel tuning
- Anti-Lag functionality
- Live monitoring and datalogging
- Customizable map editor
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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.
Flagger
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FLAGGER - REACTION TIME TRAINER Master your racing starts and improve your reaction times with Flagger, the ultimate drag racing reaction trainer and performance analyzer. Whether you're a professional racer or just getting started, Flagger helps you perfect your launches and analyze your performance with precision. KEY FEATURES: REAL-TIME G-FORCE MEASUREMENT Track your vehicle's acceleration with advanced motion sensing technology, giving you detailed insights into your launch performance. MULTIPLAYER RACING Challenge friends to head-to-head races or practice sessions. Create race rooms and share them easily with a unique code. PROFESSIONAL GRADE ANALYSIS Get detailed breakdowns of your: Reaction times Peak G-force Launch consistency Performance trends CUSTOMIZABLE PRACTICE Adjustable countdown timers Choose between MPH or KM/H Practice different tree configurations RACE HISTORY Keep track of your progress with detailed historical data of all your runs, helping you identify patterns and improvements. SOCIAL FEATURES Share your results Compare performances Challenge friends Perfect for: Drag racers Motorsport enthusiasts Racing teams Driver training Performance tracking Download Flagger now and start improving your reaction times and launch performance!
Screenshots
Verdict
The clearest difference is ads: bootmod3 at none against Flagger's shown. bootmod3 also leads on update cadence (every 5 days vs every 2 months) and iOS requirement (15.0 vs 17.0). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
bootmod3 ships an update every 5 days, Flagger every 2 months. The most recent releases landed on October 11, 2026 and October 1, 2026 respectively.
| Parameter | bootmod3 | Flagger |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (1.8K ratings) — better | — |
| Positive reviews | 70.0% of reviews | — |
| Number of ratings | 1.8K — better | — |
| Update frequency | Every 5 days — better | Every 2 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 178 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | PRO TUNING FREAKS INC. | Sheharyar Irfan |
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
Flagger
Not enough reviews yet to summarise bugs or requests.
In-app purchases
bootmod3
No in-app purchases
Flagger
No in-app purchases









