# E vs PredatorX

The clearest difference is rating: E at 3.9 against PredatorX's 2.1. E also leads on in-app purchases (none vs 3) and review sentiment (46% vs 28%). PredatorX's advantage is update cadence (every 3 weeks vs every 5 months). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. PredatorX sells 3 one-off in-app purchases. E asks for nothing beyond the download.

E holds the better App Store score, 3.9 against 2.1. Both are backed by a comparable volume of ratings — 24 and 30 respectively. Written reviews point the same way: 46% of E's written reviews are positive against 28% of PredatorX's.

E ships an update every 5 months, PredatorX every 3 weeks. The most recent releases landed on September 29, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | E | PredatorX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (24 ratings)](https://appshunter.io/ios/app/e-tuner-4/id1579096205/reviews)** | [2.1 (30 ratings)](https://appshunter.io/ios/app/predatorx/id6502660468/reviews) |
| Number of ratings | 24 | **30** |
| Positive reviews | **46.2% of reviews** | 28.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 51 MB | 124 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Edelbrock Corp](https://appshunter.io/developer/1579096297) | [Holley Performance Products](https://appshunter.io/developer/1175069390) |

## What reviewers say

### 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, Vision Pro support

**In-app purchases:** none


### PredatorX

[App page](https://appshunter.io/ios/app/predatorx/id6502660468)

This application enables vehicle tuning through the DS-MFD module. It provides a direct interface for adjusting vehicle performance parameters.

**Highlights:** Vehicle tuning, DS-MFD module integration, Performance adjustment

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Throttle Booster | $29.95 | one-time |
| FlashPaq | $124.99 | one-time |
| PCM Cross Ship | $274.99 | one-time |


## Frequently asked questions

### Is E free?

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

### Is PredatorX free?

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

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

E is rated higher. E averages 3.9 out of 5 from 24 ratings, while PredatorX averages 2.1 from 30 ratings.

### Do E or PredatorX have ads?

Neither E nor PredatorX shows ads.

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

E ships an update every 5 months, and PredatorX every 3 weeks. Most recently, E was updated on September 29, 2026 and PredatorX on September 20, 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.*