# MHD Flasher vs CARNIX

The clearest difference is in-app purchases: MHD Flasher at none against CARNIX's 10. MHD Flasher also leads on update cadence (weekly vs every 5 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. CARNIX sells 10 in-app purchases, starting at $3.99 per month. MHD Flasher asks for nothing beyond the download.

MHD Flasher ships an update weekly, CARNIX every 5 weeks. Both last shipped on November 13, 2026.

## The numbers

| Metric | MHD Flasher | CARNIX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (216 ratings)](https://appshunter.io/ios/app/mhd-flasher/id1468182144/reviews)** | — |
| Number of ratings | **216** | — |
| Positive reviews | 65.1% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 5 weeks |
| Monetization | Free | — |
| Size | 241 MB | 38 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MHD Tuning UG (haftungsbeschraenkt)](https://appshunter.io/developer/1445162439) | [Shota Topchishvili](https://appshunter.io/developer/6792778434) |

## What reviewers say

### MHD Flasher

[App page](https://appshunter.io/ios/app/mhd-flasher/id1468182144)

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 top speed limiters.

**Highlights:** Full OBD ECU flashing, Multiple performance map stages, Real-time engine parameter monitoring, Customizable flash options, Supports various BMW engine models, Fast installation and map changes

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Fast flashing speeds (16-30 seconds)
- 👍 User-friendly interface and intuitive design
- 💪 Significant power gains and performance improvements
- 🎯 Excellent OTS (off-the-shelf) maps with multiple fuel options
- 📊 Comprehensive data logging and monitoring capabilities

**What reviewers complain about**

- 🐛 Frequent app crashes and stability issues
- ❌ Recent update broke core functionality for many users
- 🔌 Connection problems with WiFi adapters
- 📵 Unable to open app after recent updates
- 😞 Poor customer support responsiveness (recent)

**Reported bugs**

- 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

**Requested features**

- 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


### CARNIX

[App page](https://appshunter.io/ios/app/carnix/id6792778432)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CARNIX + Adapter | $3.99 | per month |
| CARNIX 2 Cars + Adapter | $6.99 | per month |
| CARNIX 3 Cars + Adapter | $8.99 | per month |
| CARNIX 3 Cars — Monthly | $8.99 | per month |
| CARNIX 4 Cars — Monthly | $11.99 | per month |
| CARNIX 4 Cars + Adapter | $11.99 | per month |
| CARNIX 5 Cars + Adapter | $13.99 | per month |
| CARNIX 5 Cars — Monthly | $13.99 | per month |
| CARNIX 4 Cars — Yearly | $68.99 | per year |
| CARNIX 5 Cars — Yearly | $83.99 | per year |


## Frequently asked questions

### Is MHD Flasher free?

MHD Flasher is free to download, with no in-app purchases.

### Is CARNIX free?

CARNIX is free to download, with in-app purchases available.

### Do MHD Flasher or CARNIX have ads?

Neither MHD Flasher nor CARNIX shows ads.

### Which is updated more often, MHD Flasher or CARNIX?

MHD Flasher ships an update weekly, and CARNIX every 5 weeks. Most recently, MHD Flasher was updated on November 13, 2026 and CARNIX on November 13, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*