# E85 App vs KTuner FlexFuel

The clearest difference is rating: KTuner FlexFuel at 5.0 against E85 App's 4.0. KTuner FlexFuel also leads on in-app purchases (none vs 3) and ads (none vs shown). E85 App's advantage is ratings volume (33 vs 1). On price and device support there is nothing between them.

Both are free to download. E85 App sells 3 in-app purchases, starting at $2.99 per month. KTuner FlexFuel asks for nothing beyond the download.

KTuner FlexFuel holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: E85 App has 33 ratings behind it against 1, so its average is the more settled of the two.

E85 App ships an update every 9 days, KTuner FlexFuel daily. The most recent releases landed on September 18, 2026 and August 19, 2026 respectively.

## The numbers

| Metric | E85 App | KTuner FlexFuel |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (33 ratings)](https://appshunter.io/ios/app/e85-app/id1508517906/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ktuner-flexfuel/id6447161311/reviews)** |
| Number of ratings | **33** | 1 |
| Positive reviews | 48.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 9 days | **Daily** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 27 MB | 41 MB |
| Requires iOS | 17.0 | **11.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ahmed Elsayed](https://appshunter.io/developer/1497438505) | [Peter Linszter](https://appshunter.io/developer/530077583) |

## What reviewers say

### E85 App

[App page](https://appshunter.io/ios/app/e85-app/id1508517906)

Find E85 gas stations nearby and calculate E85 fuel mixtures. This tool is designed for car enthusiasts who use or are interested in E85 fuel.

**Highlights:** E85 gas station locator, E85 mix calculator, Location-based search, Fuel mixture calculations

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| E85 Pro Monthly | $2.99 | per month |
| E85 Pro Yearly | $19.99 | per year |
| Remove Ads | $5.99 | one-time |


### KTuner FlexFuel

[App page](https://appshunter.io/ios/app/ktuner-flexfuel/id6447161311)

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.

**Highlights:** Bluetooth BLE connectivity, Real-time ethanol content display, Real-time temperature display, Supports KTuner FlexFuel units

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is E85 App free?

E85 App is free to download, with in-app purchases available.

### Is KTuner FlexFuel free?

KTuner FlexFuel is free to download, with no in-app purchases.

### Which has better reviews, E85 App or KTuner FlexFuel?

KTuner FlexFuel is rated higher. E85 App averages 4.0 out of 5 from 33 ratings, while KTuner FlexFuel averages 5.0 from 1 ratings.

### Do E85 App or KTuner FlexFuel have ads?

E85 App shows ads; KTuner FlexFuel does not.

### Which is updated more often, E85 App or KTuner FlexFuel?

E85 App ships an update every 9 days, and KTuner FlexFuel daily. Most recently, E85 App was updated on September 18, 2026 and KTuner FlexFuel on August 19, 2026.

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