# PROFLEX Connect vs e85Cal

The clearest difference is review sentiment: e85Cal at 83% against PROFLEX Connect's 39%. e85Cal also leads on rating (4.7 vs 2.8). PROFLEX Connect's advantage is update cadence (weekly vs every 4 months). 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 2.8. Both are backed by a comparable volume of ratings — 54 and 35 respectively. Written reviews point the same way: 39% of PROFLEX Connect's written reviews are positive against 83% of e85Cal's.

PROFLEX Connect ships an update weekly, e85Cal every 4 months. The most recent releases landed on October 8, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | PROFLEX Connect | e85Cal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.8 (54 ratings)](https://appshunter.io/ios/app/proflex-connect/id1262287275/reviews) | **[4.7 (35 ratings)](https://appshunter.io/ios/app/e85cal/id1470313135/reviews)** |
| Number of ratings | **54** | 35 |
| Positive reviews | 39.3% of reviews | **83.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 4 months |
| Monetization | Free | Free |
| Size | 22 MB | 15 MB |
| Requires iOS | 12.4 | **12.1** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ADVANCED FUEL DYNAMICS](https://appshunter.io/developer/1564136309) | [Michael Joe](https://appshunter.io/developer/1132486512) |

## What reviewers say

### PROFLEX Connect

[App page](https://appshunter.io/ios/app/proflex-connect/id1262287275)

This app allows you to monitor your vehicle's fuel system performance in real-time. It displays device settings and helps locate nearby E85 fuel stations for convenient ethanol blending.

**Highlights:** Real-time device setting display, E85 station locator, Fuel ratio monitoring, Performance flex fuel system integration

**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 PROFLEX Connect free?

PROFLEX Connect 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, PROFLEX Connect or e85Cal?

e85Cal is rated higher. PROFLEX Connect averages 2.8 out of 5 from 54 ratings, while e85Cal averages 4.7 from 35 ratings.

### Do PROFLEX Connect or e85Cal have ads?

Neither PROFLEX Connect nor e85Cal shows ads.

### Which is updated more often, PROFLEX Connect or e85Cal?

PROFLEX Connect ships an update weekly, and e85Cal every 4 months. Most recently, PROFLEX Connect was updated on October 8, 2026 and e85Cal on September 26, 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.*