# Tuner Assist vs e85Cal

The clearest difference is review sentiment: e85Cal at 83% against Tuner Assist's 40%. e85Cal also leads on rating (4.7 vs 3.0) and in-app purchases (none vs 2). Tuner Assist's advantage is update cadence (every 2 weeks vs every 4 months) and iOS requirement (8.0 vs 12.1). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. Tuner Assist sells 2 one-off in-app purchases. e85Cal asks for nothing beyond the download.

e85Cal holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: e85Cal has 37 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 40% of Tuner Assist's written reviews are positive against 83% of e85Cal's.

Tuner Assist ships an update every 2 weeks, e85Cal every 4 months. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Tuner Assist | e85Cal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/tuner-assist/id1182909055/reviews) | **[4.7 (37 ratings)](https://appshunter.io/ios/app/e85cal/id1470313135/reviews)** |
| Number of ratings | 2 | **37** |
| Positive reviews | 40.0% of reviews | **83.3% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 4 months |
| Monetization | Free | Free |
| Size | 8 MB | 15 MB |
| Requires iOS | **8.0** | 12.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [John Visconti](https://appshunter.io/developer/1182909054) | [Michael Joe](https://appshunter.io/developer/1132486512) |

## What reviewers say

### Tuner Assist

[App page](https://appshunter.io/ios/app/tuner-assist/id1182909055)

Review EcuTek logs generated with ECU Connect on your iPhone or iPad. Originally for Visconti Tuning customers, it's now available to all EcuTek users.

**Highlights:** Review EcuTek logs, Compatible with ECU Connect, Supports iPhone, iPad, iPod, Available to all EcuTek users, QR code activation option

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Log Preview & Graphing | $9.99 | one-time |
| Log Preview & Graphing | $19.99 | one-time |


### 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 Tuner Assist free?

Tuner Assist is free to download, with in-app purchases available.

### Is e85Cal free?

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

### Which has better reviews, Tuner Assist or e85Cal?

e85Cal is rated higher. Tuner Assist averages 3.0 out of 5 from 2 ratings, while e85Cal averages 4.7 from 37 ratings.

### Do Tuner Assist or e85Cal have ads?

Neither Tuner Assist nor e85Cal shows ads.

### Which is updated more often, Tuner Assist or e85Cal?

Tuner Assist ships an update every 2 weeks, and e85Cal every 4 months. Most recently, Tuner Assist was updated on October 20, 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.*