# JB4 Mobile vs UAF Control

The clearest difference is review sentiment: JB4 Mobile at 52% against UAF Control's 0%. JB4 Mobile also leads on rating (3.8 vs 3.3) and ratings volume (239 vs 4). UAF Control's advantage is price (Free vs $27.99). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

UAF Control 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 3.3. That said, the two scores are not equally well evidenced: JB4 Mobile has 239 ratings behind it against 4, 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 0% of UAF Control's.

JB4 Mobile ships an update every 3 months, UAF Control every 2 months. The most recent releases landed on September 28, 2026 and June 23, 2026 respectively.

## The numbers

| Metric | JB4 Mobile | UAF Control |
| --- | --- | --- |
| Price | $27.99 | **Free** |
| Rating | **[3.8 (239 ratings)](https://appshunter.io/ios/app/jb4-mobile/id794841332/reviews)** | [3.3 (4 ratings)](https://appshunter.io/ios/app/uaf-control/id6751061049/reviews) |
| Number of ratings | **239** | 4 |
| Positive reviews | **52.4% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | Free |
| Best chart rank | **#8** | — |
| Size | 24 MB | 28 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dmac Mobile Developments, LLC](https://appshunter.io/developer/372235786) | [Corporation Unitronic Inc](https://appshunter.io/developer/1693388679) |

## 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


### UAF Control

[App page](https://appshunter.io/ios/app/uaf-control/id6751061049)

Wirelessly adjust advanced features of your vehicle's ECU tuning software. Customize launch control, exhaust flap behavior, and exhaust overrun sound for a personalized driving experience. Requires specific hardware and tuned ECU software.

**Highlights:** Adjust launch control RPM and boost, Customize exhaust flap behavior by drive mode, Personalize exhaust overrun sound duration and intensity, Wireless on-the-fly adjustments, Requires custom Bluetooth module and tuned ECU software

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is JB4 Mobile free?

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

### Is UAF Control free?

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

### Which has better reviews, JB4 Mobile or UAF Control?

JB4 Mobile is rated higher. JB4 Mobile averages 3.8 out of 5 from 239 ratings, while UAF Control averages 3.3 from 4 ratings.

### Do JB4 Mobile or UAF Control have ads?

Neither JB4 Mobile nor UAF Control shows ads.

### Which is updated more often, JB4 Mobile or UAF Control?

JB4 Mobile ships an update every 3 months, and UAF Control every 2 months. Most recently, JB4 Mobile was updated on September 28, 2026 and UAF Control on June 23, 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.*