# E85 App vs Kerf Construction Calculator

The clearest difference is price: E85 App at Free against Kerf Construction Calculator's $9.99. E85 App also leads on iOS requirement (17.0 vs 26.0). Kerf Construction Calculator's advantage is in-app purchases (none vs 3) and ads (none vs shown). On update cadence there is nothing between them.

E85 App is free to download; Kerf Construction Calculator costs $9.99 up front. E85 App sells 3 in-app purchases, starting at $2.99 per month. Kerf Construction Calculator asks for nothing beyond the download.

E85 App ships an update weekly, Kerf Construction Calculator every 10 days. The most recent releases landed on October 25, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | E85 App | Kerf Construction Calculator |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[4.4 (59 ratings)](https://appshunter.io/ios/app/e85-app/id1508517906/reviews)** | — |
| Number of ratings | **59** | — |
| Positive reviews | 51.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 10 days |
| Monetization | Free with in-app purchases | — |
| Size | 27 MB | 4 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Ahmed Elsayed](https://appshunter.io/developer/1497438505) | [Koreniuk Oleksandr](https://appshunter.io/developer/1563057206) |

## 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 |

**What reviewers like**

- 👍 Helpful for finding E85 stations
- 👍 Accurate E85 station information
- 👍 Useful E85 calculator
- 👍 Good for travel
- 👍 All-in-one app

**What reviewers complain about**

- 🐛 Black screen on startup
- 🐛 Frequent ads are annoying
- 🐛 Ads are uncloseable
- 🐛 Paid version still has ads
- 🐛 Missing many E85 stations

**Reported bugs**

- Black screen after updates
- App shows blank black screen
- App deleted account after sign out
- Ads are uncloseable
- Coinbase ad cannot be closed

**Requested features**

- Add option to add/suggest stations
- Make search easier
- Improve money log keypad
- Make favorites more accessible
- Add live, up-to-date prices


### Kerf Construction Calculator

[App page](https://appshunter.io/ios/app/kerf-construction-calculator/id6788179502)

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is E85 App free?

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

### Is Kerf Construction Calculator free?

Kerf Construction Calculator costs $9.99, with no in-app purchases.

### Do E85 App or Kerf Construction Calculator have ads?

E85 App shows ads; Kerf Construction Calculator does not.

### Which is updated more often, E85 App or Kerf Construction Calculator?

E85 App ships an update weekly, and Kerf Construction Calculator every 10 days. Most recently, E85 App was updated on October 25, 2026 and Kerf Construction Calculator on October 9, 2026.

---

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