Comparison

MHD Flasher vs iWire Connect

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

Head to head
About

MHD Flasher

This app allows BMW owners to remap their vehicle's engine control unit for enhanced performance and drivability. It offers full OBD flashing, various performance maps, and real-time engine monitoring. Users can also customize flash options like exhaust burble and Vmax removal.

Highlights
  • Full OBD engine remapping
  • Multiple performance map stages
  • Real-time engine parameter monitoring
  • Configurable gauge layouts
  • Customizable flash options
  • Fast installation and map changes
  • Revert to OEM flash capability
Features
Read full description

MHD Flasher is a complete flash tuning app for your BMW. Unlike a piggyback module, it is capable of complete DME remapping while retaining all OEM safety mechanisms. This allows for maximum performance,maximum safety, and unrivaled drivability. --------------------------------------------- Full OBD Flashing: You can install MHD right at home and start tuning immediately! Simply download the MHD Flasher app that connects via a Wi-Fi adapter to your iOS device and your vehicle’s OBD-II port, start the app, and within 4 minutes the initial installation is complete. Further map changes are much faster - only 20 seconds! You can revert your vehicle to the factory OEM flash at any point, and no initial backup is necessary. --------------------------------------------- Stage 1, Stage 2 und E85 OTS (Off The Shelf) Maps by PureBoost: N55 EWG (Vehicles built after 07/2013 with electronic wastegate): - Stage 1 (up to 360HP/540NM) (not available for M2 and X4 M40i) - Stage 2 (up to 390HP/580NM) - Stage 2+ (up to 430HP/630NM) - Ethanol Mix Maps: Stage 1, 2 and 2+ E20 Maps for ethanol blends of 20% N55 PWG (pneumatic wastegate): - Stage 1 (up to 340HP/540NM) - Stage 2 (up to 370HP/580NM) - Stage 2+ (up to 400HP/630NM) - Ethanol Mix Maps: Stage 1, 2 and 2+ E20 Maps for ethanol blends of 20% S55 (BMW M3 / M4 F8x): - Stage 1 (up to 530HP/700NM) - Stage 2 (up to 560HP/780NM) - Ethanol Mix Maps: Stage 1, 2 and 2+ E30 Maps for ethanol blends of 30% B58: - Stage 1 (up to 420HP/580NM) - Stage 2 (up to 470HP/630NM) - Ethanol Mix Maps: Stage 1, 2 Maps for ethanol blends of 30% --------------------------------------------- Monitor your engine behavior to make sure it is running perfectly using a configurable and very responsive gauge layout. 50+ engine parameters are available at a glance! These are some of the available monitors: - Boost, Boost Target - Lambda (AFR) - Intake Air Temp (IAT) - Ignition Timing per Cylinder - Coolant Temperature - Oil Temperature, Oil Pressure - Transmission Temperature - High Pressure Fuel Pump (HPFP) - Throttle Position - Wastegate Duty-Cycle (WGDC) - RPM - Speed - EGT And many more… MHD exclusive advanced monitor: - Timing Corrections per Cylinder - Boost target EX which can read higher than 22.x psi (the BMW boost target channel can't) - Base Compressor Axis: Boost Setpoint, MAF req WGDC. - Active Torque Limiters And many more… --------------------------------------------- These flash options can be applied to any map directly through the app: - Exhaust Burble (duration & aggressiveness, min speed, min rpm) - N20 Map Sensor (on N55) - Remove top speed limiter (Vmax) - Cold start noise reduction - Exhaust flap open in sport mode - Limit power per gear - XHP TCU flash support (optimizied OTS maps) - Sport cooling mode for increased water / air intercooler cooling (B58 only) --------------------------------------------- Supported E-Series Vehicles: 135i, 135is, 335i and 535i 2006-2013 335is 2011-2013 Z4 35i/is 2009-2015 1M 2011-2012 X1 35i 2010-2013 X5 35i 2010-2013 X6 35i 2008-2014 Supported F/G Series Vehicles: M135i F2x N55 2012 - 2016 M235i F2x N55 2013 - 2016 M2 F87 N55 2015 - 2018 335i N55 F3x 2011 - 2015 435i N55 F3x 2013 - 2016 535i / GT N55 F1x 2010 - 2017 640i N55 F0x 2011 - 2017 740i N55 F0x 2012 - 2015 X3 35i N55 F25 2010 - 2017 X4 35i / M40i N55 F26 2014 - 2018 X5 40i N55 F15 2013 - 2018 X6 40i N55 F16 2014 - 2018 M3 S55 F80 2014 - 2019 M4 S55 F82 2014 - 2019 M4 S55 F83 2014 - 2019 M140i F2x 2012 - 2019 M240i F2x 2016 - 2019 340i F3x 2015 - 2019 440i F3x 2016 - 2019 540i G3x 2017 - 640i GT G32 2017 - 740i G1x F0x 2015 - X3 M40i G01 2017 - X4 M40i G02 2018 - X5 40i G05 2018 - Z4 M40i G29 2019 - 114i F2x 2012 - 2015 116i F2x 2011 - 2015 118i F2x 2011 - 2016 120i F2x 2015 - 2017 316i F3x 2012 - 2018 X-Drive is supported on all cars. All performance power kit cars are supported. Check out our homepage / user manual for more information and recommended modifications for each stage.

About

iWire Connect

Configure and control your iWire iDCCD or iVSS devices with guided setup, live data, and firmware updates. Customize vehicle settings, adjust performance maps, and calibrate your speedometer. Personalize LED colors and ensure your device is up-to-date.

Highlights
  • Guided vehicle setup
  • iDCCD control (Auto/Manual, Handling, Maps)
  • iVSS speedometer calibration
  • Customizable LED colors and intensity
  • Firmware update management
  • Live data and gauge readings
Features
Read full description

Connect your phone to your iWire iDCCD or iVSS control unit for guided setup, live information and supported firmware updates. SET UP YOUR VEHICLE Choose your vehicle and configure supported inputs, physical switches and displays. Guided checks help you confirm the setup before you finish. CONTROL YOUR iDCCD Switch between Auto and Manual, adjust Handling %, and choose Street, Track or Off-road maps. Customize your dashboard with gauges such as GPS speed and Map Selection. Depending on your control unit, firmware and connected equipment, supported gauges can also show vehicle, electrical and AEM wideband readings. CALIBRATE YOUR iVSS Use the guided speedometer calibration and view GPS speed from your phone. MAKE IT YOURS Choose your app and device LED colors together or separately, and adjust LED intensity. KEEP YOUR DEVICE UP TO DATE Check for available firmware and install supported updates with clear progress. Configuration checks your control unit’s firmware. Offline setup is available when it matches the latest firmware version previously verified by the app. Requires a compatible iWire iDCCD or iVSS control unit. Available features and readings depend on your control unit, firmware, vehicle and connected equipment.

Screenshots

MHD Flasher4 screens
iWire Connect4 screens

Verdict

The call

The clearest difference is rating: iWire Connect at 5.0 against MHD Flasher's 4.5. MHD Flasher's advantage is ratings volume (216 vs 5). On price, update cadence, 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

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

iWire Connect holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: MHD Flasher has 216 ratings behind it against 5, so its average is the more settled of the two.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

Scorecard2 real differences · 8 level
MHD Flasher versus iWire Connect: the parameters behind the verdict, then further details
ParameterMHD FlasheriWire Connect
PriceFreeFree
Rating4.5 (216 ratings)5.0 (5 ratings) — better
Positive reviews65.1% of reviews—
Number of ratings216 — better5
Update frequencyWeeklyWeekly
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.014.0 — better
Further details — not scored
Size241 MB45 MB
Age rating4+4+
DeveloperMHD Tuning UG (haftungsbeschraenkt)iWireUSA

Customer experience

MHD Flasher

All ratings216 ratings
Positive85.6%
Neutral3.2%
Negative11.1%
Written reviews129 reviews
Positive65.1%
Neutral10.9%
Negative24.0%

iWire Connect

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

MHD Flasher

Reported bugs

16 issues
  • App crashes on iOS 26.2 and newer versions
  • Unable to flash after recent updates
  • Unable to erase memory errors
  • App fails to open after installation
  • Connection constantly disconnects on N55 F30 platform
Show 11 more
  • Unable to upload logs to SpoolStreet
  • Cannot edit burples settings after update
  • Failed flashes (7+ consecutive failures reported)
  • Invalid credentials error on new device login
  • Monitor license not functioning
  • Anti-lag feature cannot be removed once flashed
  • Lumpy cold start with startup roar enabled
  • WiFi adapter disconnects during mapping
  • Unable to prepare memory section errors
  • User guide PDF crashes app
  • Missing custom tunes after app migration

Requested features

11 requests
  • Add 94 octane fuel option
  • Support for diesel engines
  • Support for N63 engine tuning
  • Max cooling fan option in new app
  • Ability to change login email/username
Show 6 more
  • License transfer capability for car sales
  • Support for Gen 2 B58 with MHD+ features
  • Ability to revert to previous OTS map versions
  • Detailed release notes for OTS map updates
  • Custom tune file transfer to new app
  • Burbles setting in regular mode (not just sport mode)

iWire Connect

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

MHD Flasher

No in-app purchases

None

iWire Connect

No in-app purchases

Questions

Is MHD Flasher free?
MHD Flasher is free to download, with no in-app purchases.
Is iWire Connect free?
iWire Connect is free to download, with no in-app purchases.
Which has better reviews, MHD Flasher or iWire Connect?
iWire Connect is rated higher. MHD Flasher averages 4.5 out of 5 from 216 ratings, while iWire Connect averages 5.0 from 5 ratings.
Do MHD Flasher or iWire Connect have ads?
Neither MHD Flasher nor iWire Connect shows ads.
Which is updated more often, MHD Flasher or iWire Connect?
MHD Flasher ships an update weekly, and iWire Connect weekly. Most recently, MHD Flasher was updated on November 3, 2026 and iWire Connect on November 4, 2026.

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