# Tuning vs E

The clearest difference is rating: E at 4.0 against Tuning's 2.4. E also leads on review sentiment (45% vs 21%). Tuning's advantage is update cadence (every 2 months vs every 8 months) and iOS requirement (12.2 vs 16.0). 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.

E holds the better App Store score, 4.0 against 2.4. Both are backed by a comparable volume of ratings — 29 and 22 respectively. Written reviews point the same way: 21% of Tuning's written reviews are positive against 45% of E's.

Tuning ships an update every 2 months, E every 8 months. The most recent releases landed on June 10, 2026 and August 29, 2026 respectively.

## The numbers

| Metric | Tuning | E |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.4 (29 ratings)](https://appshunter.io/ios/app/tuning-pro/id1508035080/reviews) | **[4.0 (22 ratings)](https://appshunter.io/ios/app/e-tuner-4/id1579096205/reviews)** |
| Number of ratings | **29** | 22 |
| Positive reviews | 20.8% of reviews | **45.5% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 8 months |
| Monetization | Free | Free |
| Size | 31 MB | 50 MB |
| Requires iOS | **12.2** | 16.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Smart Vehicle Engineering GmbH](https://appshunter.io/developer/1508035079) | [Edelbrock Corp](https://appshunter.io/developer/1579096297) |

## What reviewers say

### Tuning

[App page](https://appshunter.io/ios/app/tuning-pro/id1508035080)

Enhance your car's performance with a tuning module. Adjust settings to match your vehicle and driving style, with modes like Eco, Sport, and Race. Receive instant updates for your car's configuration and the tuning chip's software.

**Highlights:** Car tuning module, Customizable settings, Eco, Sport, Race driving modes, Instant software updates, Product support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### E

[App page](https://appshunter.io/ios/app/e-tuner-4/id1579096205)

This app connects wirelessly to an EFI system, allowing users to monitor engine data and adjust various settings like air-fuel ratios and ignition timing. It offers a setup wizard for initial calibration and advanced tuning options for performance optimization.

**Highlights:** Bluetooth ECU communication, Live tuning of ECU settings, Real-time engine and sensor data monitoring, Setup Wizard for base calibration, Advanced tuning functions, Diagnostic troubleshooting page, Vivid gauge displays

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Tuning free?

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

### Is E free?

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

### Which has better reviews, Tuning or E?

E is rated higher. Tuning averages 2.4 out of 5 from 29 ratings, while E averages 4.0 from 22 ratings.

### Do Tuning or E have ads?

Neither Tuning nor E shows ads.

### Which is updated more often, Tuning or E?

Tuning ships an update every 2 months, and E every 8 months. Most recently, Tuning was updated on June 10, 2026 and E on August 29, 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.*