# Boostane vs E85 Calculator

The clearest difference is rating: Boostane at 2.0 against E85 Calculator's 1.0. Boostane also leads on ratings volume (27 vs 1) and update cadence (every 14 months vs every 29 months). E85 Calculator's advantage is review sentiment (25% vs 7%). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Boostane holds the better App Store score, 2.0 against 1.0. That said, the two scores are not equally well evidenced: Boostane has 27 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 7% of Boostane's written reviews are positive against 25% of E85 Calculator's, so the app with the better star average is not the one people write more warmly about.

Boostane ships an update every 14 months, E85 Calculator every 29 months. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Boostane | E85 Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (27 ratings)](https://appshunter.io/ios/app/boostane/id605708599/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/e85-calculator/id1029273167/reviews) |
| Number of ratings | **27** | 1 |
| Positive reviews | 6.9% of reviews | **25.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 14 months** | Every 29 months |
| Monetization | Free | Free |
| Size | 38 MB | 3 MB |
| Requires iOS | **10.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [BOOSTane, LLC](https://appshunter.io/developer/605708602) | [Sheharyar Irfan](https://appshunter.io/developer/974971911) |

## What reviewers say

### Boostane

[App page](https://appshunter.io/ios/app/boostane/id605708599)

Calculate the precise amount of octane booster needed to achieve your desired fuel octane. Save calculations, share them via email or text, and get estimated horsepower gains.

**Highlights:** Calculate required octane booster amount, Save calculations to favorites, Share calculations via email or text, Estimate horsepower gains, User-friendly design

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Boostane free?

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

### Is E85 Calculator free?

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

### Which has better reviews, Boostane or E85 Calculator?

Boostane is rated higher. Boostane averages 2.0 out of 5 from 27 ratings, while E85 Calculator averages 1.0 from 1 ratings.

### Do Boostane or E85 Calculator have ads?

Neither Boostane nor E85 Calculator shows ads.

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

Boostane ships an update every 14 months, and E85 Calculator every 29 months. Most recently, Boostane was updated on October 22, 2026 and E85 Calculator on October 24, 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.*