MHD N55 E vs eFlexApp
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MHD N55 E
This utility app is being retired and users are encouraged to switch to a unified flasher app. It retains some functionality for reading and clearing engine error codes, analyzing past data logs, and accessing vehicle licenses and user guides.
- Read and clear engine DTC error codes
- Graph and analyze prior datalogs
- View existing vehicle licenses
- Access user guide
- Transition to unified flasher app
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This app is being retired. Please switch to our unified "MHD Flasher" app which now supports all E/F/G series vehicles / engines as well as Supra. This app will remain as a shell to help you switch over. Additionally, some functionality will remain to read and clear engine DTC error codes, graph and analyze your prior datalogs, view your existing vehicle licenses, and access the user guide!
eFlexApp
Monitor your eFlexFuel device in real-time, with features varying by device version. Adjust settings like language, temperature units, and theme. Track ethanol content, engine temperature, and more, depending on your specific eFlexFuel model.
- Real-time device monitoring
- Adjustable settings (language, temp, theme)
- Ethanol content tracking
- Engine temperature monitoring
- Device status checks
- Bluetooth connectivity
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With eFlexApp you can monitor your eFlexFuel device in real time. eFlexApp recognizes your eFlexFuel device version and offers different features with each product. The app also enables adjusting of eFlexPlus and eFlexPro devices. Change language (English, French, Finnish), temperature unit (°F/°C) and theme (light/dark). eFlexEco, eFlexBlue and eFlexFuel MONITOR: ethanol content, duty cycle, fuel temperature, ambient engine temperature, injector activity & cold enrichment, (engine RPM in eFlexEco Firmware 11.0+) CHECK: device status eFlexPlus Direct, eFlexBlue Direct MONITOR: ethanol content, engine RPM, duty cycle, fuel temperature, ambient engine temperature, injector activity & cold enrichment CHECK: device status eFlexPlus and eFlexMoto Plus MONITOR: ethanol content, engine RPM, duty cycle, fuel temperature, ambient engine temperature, injector activity & cold enrichment ADJUST: RPM based enrichment with driving mode selection (save a custom driving mode setting created with eFlexTuner software) & cold enrichment (save a custom setting created with eFlexTuner software) CHECK: device status, startup information eFlexPro and eFlexMoto Pro MONITOR: ethanol content, engine RPM, duty cycle, fuel temperature, ambient engine temperature, injector activity & cold enrichment ADJUST: RPM based enrichment with driving mode selection (save up to three custom driving mode settings created with eFlexTuner software) & cold enrichment (save a custom setting created with eFlexTuner software) CHECK: device status, startup information eFlexApp communicates with your eFlexFuel device via Bluetooth. Permission to use Bluetooth is required. Please contact support@eflexfuel.com if you have any feedback! Developed by StepOne Tech Ltd
Screenshots
Verdict
The clearest difference is review sentiment: MHD N55 E at 79% against eFlexApp's 33%. MHD N55 E also leads on rating (4.6 vs 3.4) and ratings volume (53 vs 8). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
MHD N55 E holds the better App Store score, 4.6 against 3.4. That said, the two scores are not equally well evidenced: MHD N55 E has 53 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 79% of MHD N55 E's written reviews are positive against 33% of eFlexApp's.
MHD N55 E ships an update every 3 weeks, eFlexApp monthly. The most recent releases landed on June 11, 2026 and July 9, 2026 respectively.
| Parameter | MHD N55 E | eFlexApp |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (53 ratings) — better | 3.4 (8 ratings) |
| Positive reviews | 79.2% of reviews — better | 33.3% of reviews |
| Number of ratings | 53 — better | 8 |
| Update frequency | Every 3 weeks — better | Monthly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 10.2 — better | 15.6 |
| Further details — not scored | ||
| Size | 123 MB | 58 MB |
| Age rating | 4+ | 4+ |
| Developer | MHD Tuning UG (haftungsbeschraenkt) | StepOne Tech Ltd |
Customer experience
MHD N55 E
eFlexApp
In-app purchases
MHD N55 E
No in-app purchases
eFlexApp
No in-app purchases
