# Boostane vs e85Cal

The clearest difference is review sentiment: e85Cal at 83% against Boostane's 7%. e85Cal also leads on rating (4.7 vs 2.0) and update cadence (every 4 months vs every 14 months). Boostane's advantage is iOS requirement (10.0 vs 12.1). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

e85Cal holds the better App Store score, 4.7 against 2.0. Both are backed by a comparable volume of ratings — 27 and 37 respectively. Written reviews point the same way: 7% of Boostane's written reviews are positive against 83% of e85Cal's.

Boostane ships an update every 14 months, e85Cal every 4 months. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Boostane | e85Cal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (27 ratings)](https://appshunter.io/ios/app/boostane/id605708599/reviews) | **[4.7 (37 ratings)](https://appshunter.io/ios/app/e85cal/id1470313135/reviews)** |
| Number of ratings | 27 | **37** |
| Positive reviews | 6.9% of reviews | **83.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 4 months** |
| Monetization | Free | Free |
| Size | 38 MB | 15 MB |
| Requires iOS | **10.0** | 12.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BOOSTane, LLC](https://appshunter.io/developer/605708602) | [Michael Joe](https://appshunter.io/developer/1132486512) |

## 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


### e85Cal

[App page](https://appshunter.io/ios/app/e85cal/id1470313135)

This app assists users in calculating the precise amounts of standard and ethanol gasoline needed to achieve a desired ethanol percentage in their fuel mix. It simplifies the process by taking into account tank size, current fuel level, and the ethanol content of available fuel types.

**Highlights:** Calculate ethanol percentage goal, Enter gas tank size, Input standard pump gas ethanol %, Input ethanol pump gas ethanol %, Set target ethanol % mix, Enter current fuel level %

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Boostane free?

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

### Is e85Cal free?

e85Cal is free to download, with no in-app purchases.

### Which has better reviews, Boostane or e85Cal?

e85Cal is rated higher. Boostane averages 2.0 out of 5 from 27 ratings, while e85Cal averages 4.7 from 37 ratings.

### Do Boostane or e85Cal have ads?

Neither Boostane nor e85Cal shows ads.

### Which is updated more often, Boostane or e85Cal?

Boostane ships an update every 14 months, and e85Cal every 4 months. Most recently, Boostane was updated on October 22, 2026 and e85Cal 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.*