# E85 Calculator vs CANflex

The clearest difference is update cadence: CANflex at every 6 months against E85 Calculator's every 29 months. CANflex also leads on iOS requirement (13.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

E85 Calculator ships an update every 29 months, CANflex every 6 months. The most recent releases landed on September 8, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | E85 Calculator | CANflex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (2 ratings)](https://appshunter.io/ios/app/e85-calculator/id1029273167/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 29 months | **Every 6 months** |
| Monetization | Free | — |
| Size | 3 MB | 24 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sheharyar Irfan](https://appshunter.io/developer/974971911) | [Burger Motorsports, Inc](https://appshunter.io/developer/1815297026) |

## What reviewers say

### E85 Calculator

[App page](https://appshunter.io/ios/app/e85-calculator/id1029273167)

This application helps performance enthusiasts and flex-fuel vehicle owners precisely calculate the amounts of E85 and gasoline needed for specific ethanol percentages or octane ratings. It offers both simple and advanced modes for fuel mixing calculations, supporting metric and imperial units.

**Highlights:** Calculate E85 and gasoline amounts, Target specific ethanol percentages, Calculate by desired octane rating, Metric and imperial unit support, Real-time calculations, Easy and advanced modes

**Features:** macOS Compatibility

**In-app purchases:** none


### CANflex

[App page](https://appshunter.io/ios/app/canflex/id6746137635)

**In-app purchases:** none


## Frequently asked questions

### Is E85 Calculator free?

E85 Calculator is free to download, with no in-app purchases.

### Is CANflex free?

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

### Do E85 Calculator or CANflex have ads?

Neither E85 Calculator nor CANflex shows ads.

### Which is updated more often, E85 Calculator or CANflex?

E85 Calculator ships an update every 29 months, and CANflex every 6 months. Most recently, E85 Calculator was updated on September 8, 2026 and CANflex on September 15, 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.*