Fuel vs KTuner FlexFuel
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
KTuner FlexFuel
This utility app connects to specific hardware units via Bluetooth to display real-time ethanol content and temperature. It provides essential data for users monitoring fuel mixtures.
- Bluetooth BLE connectivity
- Real-time ethanol content display
- Real-time temperature display
- Supports KTuner FlexFuel units
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The app connects to the KTuner FlexFuel units using Bluetooth BLE and displays realtime ethanol content and temperature.
Screenshots
Verdict
The clearest difference is rating: KTuner FlexFuel at 5.0 against Fuel's 3.1. KTuner FlexFuel also leads on update cadence (daily vs every 10 months) and iOS requirement (11.0 vs 13.4). Fuel's advantage is ratings volume (33 vs 1). On price, ads, in-app purchases and monetization model 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.
KTuner FlexFuel holds the better App Store score, 5.0 against 3.1. That said, the two scores are not equally well evidenced: Fuel has 33 ratings behind it against 1, so its average is the more settled of the two.
Fuel ships an update every 10 months, KTuner FlexFuel daily. The most recent releases landed on August 27, 2026 and August 19, 2026 respectively.
| Parameter | Fuel | KTuner FlexFuel |
|---|---|---|
| Price | Free | Free |
| Rating | 3.1 (33 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 33 — better | 1 |
| Update frequency | Every 10 months | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 13.4 | 11.0 — better |
| Further details — not scored | ||
| Size | 20 MB | 41 MB |
| Age rating | 4+ | 4+ |
| Developer | Dmac Mobile Developments, LLC | Peter Linszter |
Customer experience
Fuel
KTuner FlexFuel
In-app purchases
Fuel
No in-app purchases
KTuner FlexFuel
No in-app purchases
