# JB4 Mobile vs Engine Link LE

The clearest difference is price: Engine Link LE at Free against JB4 Mobile's $27.99. Engine Link LE also leads on iOS requirement (12.0 vs 15.1). JB4 Mobile's advantage is rating (3.8 vs 3.2) and ratings volume (239 vs 12). On review sentiment, ads, in-app purchases and monetization model there is nothing between them.

Engine Link LE is free to download; JB4 Mobile costs $27.99 up front. Neither carries in-app purchases, so what you see is what you pay.

JB4 Mobile holds the better App Store score, 3.8 against 3.2. That said, the two scores are not equally well evidenced: JB4 Mobile has 239 ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 52% of JB4 Mobile's written reviews are positive against 46% of Engine Link LE's.

JB4 Mobile ships an update every 3 months, Engine Link LE every 6 months. The most recent releases landed on September 23, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | JB4 Mobile | Engine Link LE |
| --- | --- | --- |
| Price | $27.99 | **Free** |
| Rating | **[3.8 (239 ratings)](https://appshunter.io/ios/app/jb4-mobile/id794841332/reviews)** | [3.2 (12 ratings)](https://appshunter.io/ios/app/engine-link-le/id1222128102/reviews) |
| Number of ratings | **239** | 12 |
| Positive reviews | **52.4% of reviews** | 46.2% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 6 months |
| Monetization | Free | Free |
| Best chart rank | **#8** | — |
| Size | 24 MB | 9 MB |
| Requires iOS | 15.1 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dmac Mobile Developments, LLC](https://appshunter.io/developer/372235786) | [K SOLUTION LLC](https://appshunter.io/developer/289670447) |

## What reviewers say

### JB4 Mobile

[App page](https://appshunter.io/ios/app/jb4-mobile/id794841332)

**Currently charting:** #8 Top Paid · Sports (US App Store)

This app acts as a mobile data logger and display for vehicles equipped with a JB4 tuner. It allows users to monitor and log various engine parameters, view data in real-time, and adjust settings for performance tuning.

**Highlights:** Live gauge monitoring, Data logging and graphing, User adjustable settings, WMI settings modification, On-the-fly map switching, Code reading and deletion

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Great app and a must have with the JB4
- 🔒 Robust security features
- 👍 Awesome data logging
- 👍 Incredible Support
- 👍 Works as expected

**What reviewers complain about**

- 🐛 Doesn't work properly, screen upside down and backwards
- 🐛 Stopped working after update
- 🐛 Bluetooth connection issues
- 🐛 Gauges freezing
- 🐛 Screen turns off

**Reported bugs**

- App crashes
- Can't connect to server
- Mirrored/inverted display
- Compatibility issues with new iOS versions
- Trouble logging in

**Requested features**

- Add CarPlay support
- Allow customizing map names
- Add more gauge styling options
- Improve UI and layout
- Integrate with Apple Carplay


### Engine Link LE

[App page](https://appshunter.io/ios/app/engine-link-le/id1222128102)

Transform your iPhone into a vehicle diagnostics tool. Monitor real-time performance, read and clear fault codes, and customize gauges to display the data you need. Requires a LELink adapter for OBD2 connection.

**Highlights:** Real-time vehicle data display, Read and clear OBD fault codes, Customizable gauges and dashboard, MPG widget and fuel efficiency tracking, Heads-up display (HUD) mode, Horsepower, torque, and acceleration metrics, Support for various OBD-II/EOBD vehicles

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

**In-app purchases:** none


## Frequently asked questions

### Is JB4 Mobile free?

JB4 Mobile costs $27.99, with no in-app purchases.

### Is Engine Link LE free?

Engine Link LE is free to download, with no in-app purchases.

### Which has better reviews, JB4 Mobile or Engine Link LE?

JB4 Mobile is rated higher. JB4 Mobile averages 3.8 out of 5 from 239 ratings, while Engine Link LE averages 3.2 from 12 ratings.

### Do JB4 Mobile or Engine Link LE have ads?

Neither JB4 Mobile nor Engine Link LE shows ads.

### Which is updated more often, JB4 Mobile or Engine Link LE?

JB4 Mobile ships an update every 3 months, and Engine Link LE every 6 months. Most recently, JB4 Mobile was updated on September 23, 2026 and Engine Link LE on September 8, 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.*