Fuel vs PROFLEX Connect
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fuel
Monitor your vehicle's ethanol concentration and fuel temperature in real-time. This app wirelessly connects to a compatible Bluetooth module, freeing up your device's port for simultaneous charging and monitoring. It includes an ethanol fill-up concentration calculator and customizable display views.
- Real-time ethanol concentration monitoring
- Real-time fuel temperature monitoring
- Wireless Bluetooth connectivity
- Ethanol fill-up concentration calculator
- Fahrenheit or Celsius display options
- Two display views
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***Note that this app requires a custom Bluetooth module to function. Info on the module can be found here: https://fuel-it.com/products/fuel-it-bluetooth-flex-fuel-analyzer The Fuel-It ECA gives you realtime feedback from your Continental Ethanol sensor. Wireless communication frees up your device's port so you can monitor and charge at the same time. Features: Ethanol concentration monitoring Fuel temperature monitoring 2 Display Views Fuel temperature display in Fahrenheit or Celsius Ethanol fill-up concentration calculator
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
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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.
Screenshots
Verdict
The clearest difference is update cadence: PROFLEX Connect at weekly against Fuel's every 10 months. Fuel's advantage is rating (3.1 vs 2.8) and review sentiment (50% vs 38%). On price, ratings volume, 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.
Fuel holds the better App Store score, 3.1 against 2.8. Both are backed by a comparable volume of ratings — 34 and 56 respectively. Written reviews point the same way: 50% of Fuel's written reviews are positive against 38% of PROFLEX Connect's.
Fuel ships an update every 10 months, PROFLEX Connect weekly. The most recent releases landed on October 29, 2026 and October 21, 2026 respectively.
| Parameter | Fuel | PROFLEX Connect |
|---|---|---|
| Price | Free | Free |
| Rating | 3.1 (34 ratings) — better | 2.8 (56 ratings) |
| Positive reviews | 50.0% of reviews — better | 37.9% of reviews |
| Number of ratings | 34 | 56 — better |
| Update frequency | Every 10 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 13.4 | 12.4 — better |
| Further details — not scored | ||
| Size | 20 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Dmac Mobile Developments, LLC | ADVANCED FUEL DYNAMICS |
Customer experience
Fuel
PROFLEX Connect
In-app purchases
Fuel
No in-app purchases
PROFLEX Connect
No in-app purchases
