PROFLEX Connect vs eFlexApp
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PROFLEX Connect
This app allows you to monitor your vehicle's fuel system performance in real-time. It displays device settings and helps locate nearby E85 fuel stations for convenient ethanol blending.
- Real-time device setting display
- E85 station locator
- Fuel ratio monitoring
- Performance flex fuel system integration
Read full descriptionHide full description
PROFLEX Commander is a bolt on performance flex fuel system allowing your vehicle to make big power with ethanol right out of the box. No tuning needed. The PROFLEX Commander and FLEXLINK family of devices allow you to run any blend of gas and E85 at anytime, while always delivering the exact fuel ratio to your vehicle. The PROFLEX Connect app allows you to view your device settings in real-time, and even help you find a nearby e85 station.
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
Read full descriptionHide full description
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 rating: eFlexApp at 3.4 against PROFLEX Connect's 2.8. PROFLEX Connect's advantage is update cadence (weekly vs monthly) and ratings volume (54 vs 8). On price, review sentiment, 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.
eFlexApp holds the better App Store score, 3.4 against 2.8. That said, the two scores are not equally well evidenced: PROFLEX Connect has 54 ratings behind it against 8, so its average is the more settled of the two. Written reviews complicate that: 39% of PROFLEX Connect's written reviews are positive against 33% of eFlexApp's, so the app with the better star average is not the one people write more warmly about.
PROFLEX Connect ships an update weekly, eFlexApp monthly. The most recent releases landed on September 18, 2026 and July 9, 2026 respectively.
| Parameter | PROFLEX Connect | eFlexApp |
|---|---|---|
| Price | Free | Free |
| Rating | 2.8 (54 ratings) | 3.4 (8 ratings) — better |
| Positive reviews | 39.3% of reviews — better | 33.3% of reviews |
| Number of ratings | 54 — better | 8 |
| Update frequency | Weekly — better | Monthly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 12.4 — better | 15.6 |
| Further details — not scored | ||
| Size | 22 MB | 58 MB |
| Age rating | 4+ | 4+ |
| Developer | ADVANCED FUEL DYNAMICS | StepOne Tech Ltd |
Customer experience
PROFLEX Connect
eFlexApp
In-app purchases
PROFLEX Connect
No in-app purchases
eFlexApp
No in-app purchases
