# JB4 Mobile

> Mobile data logger and display for JB4 performance tuners. (iPhone/iPad app by Dmac Mobile Developments, LLC.)

- Source: https://appshunter.io/ios/app/jb4-mobile/id794841332 (this page in markdown: same URL + `.md`)
- Developer: [Dmac Mobile Developments, LLC](https://appshunter.io/developer/372235786)
- Category: Sports, Travel
- Price: $27.99
- Rating: 3.80/5 from 239 App Store ratings · 145 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.1 · 24 MB
- Languages: American English
- Released: 2014-02-12
- Data updated: 2026-08-27
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/jb4-mobile/id794841332/reviews.md

## What is JB4 Mobile?

The brand new JB4 Mobile application is finally ready for public release and has lots of great new features including:
*Gauge theme customizations
*Built-in raw CSV data viewer
*Revamped User Adj./WMI data editors
*New modern UI completely rewritten from the ground up
*More seamless integration with our backend servers

JB4 Connect Kit Users: 
1) Install the Connect Kit per the installation guide for your vehicle
2) Create your account/sign in with this app
3) Ensure JB4 Mobile has all requested permissions
4) Tap the Connect button in JB4 Mobile

About The App:
JB4 Mobile is a mobile data logger and display for use with the JB4 tuner from Burger Motorsports.

JB4 Mobile allows you to monitor and log multiple parameters from your JB4 equipped car. Parameters such as boost, rpm, fuel trims, air/fuel ratios, ignition advance and much more are available. 

Current Features: 
Live gauges
Data logging
Data graphing
Log export via email
Code reading/deletion
Modify User Adj. (boost, fuel, etc.) settings
Modify WMI settings
Switch maps on the fly
Auto WOT logging
JB4 Firmware Updating

JB4 ® is a registered trademark of Burger Motorsports Inc ® and is used with written permission.

## Key features

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

## Chart rankings

- #7 in Top Paid · Sports (US App Store)

## What do users think of JB4 Mobile?

Overall sentiment: neutral

**Pros**

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

**Cons**

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

**Commonly reported bugs**

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

**Most requested features**

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

## Recent user reviews (10 of 145)

All indexed reviews: https://appshunter.io/ios/app/jb4-mobile/id794841332/reviews.md

### 1/5 — Connectivity issues

*2026-07-01, version 3.0.7*

Constant connectivity issues, and they clearly never update and debug.

### 1/5 — Don’t work new version

*2026-03-17*

All new version don’t connect with old version jb4 kit . What can I do ?

### 2/5 — Wrong app for new bt adaptor

*2026-03-08, version 3.0.7*

Wrong app get jb4 pro!

### 1/5 — Did not work

*2026-03-05, version 3.0.7*

I couldn’t get it to connect. I cannot find any way to contact Support. The regular JB4 PRO app works fine wirelessly.

### 3/5 — Gauges freezing

*2026-01-31*

I actually love the app and the capabilities are nice. You can do a lot. My problem is the app keeps freezing when u have the gauges open after doing a pull. I have to toggle to the maps menus and than back to gauges for them to show live feedback again. Maybe this is something I can change in settings??? If so would change to 4 star review

### 5/5 — Yes

*2026-01-12, version 3.0.7*

App going to sleep fixed in the last update

### 3/5 — Screen turns off

*2025-11-24, version 3.0.6*

Screen turns off since ios26.. still waiting for a fix..

### 3/5 — screen turns off

*2025-11-07, version 3.0.6*

ever since updating recently, app auto locks and makes monitoring gauges nearly impossible

### 4/5 — iOS 26 update won’t allow app to stay on screen?

*2025-11-04, version 3.0.6*

App works as expected, but since iOS 26- app no longer remains logging or showing data past lock screen timer? Please update to allow use during driving! Thanks

### 4/5 — Screen turns off on iOS26

*2025-10-09*

Couldn't find another way to reach out to the developer.
The app works fine, however since updating to iOS 26, it no longer keeps the screen on when you're using the gauges, which defeats the purpose of gauges. 
On previous iOS versions, the app would keep the screen on and the phone unlocked while using it so you could view the gauges and record logs. 
Please get this fixed or add a setting to force the screen to stay on!

## Frequently asked questions about JB4 Mobile

### What does the JB4 Mobile app do?

The JB4 Mobile application serves as a mobile data logger and display for vehicles equipped with the JB4 tuner from Burger Motorsports. It enables users to monitor and log numerous parameters from their JB4-equipped car, such as boost, RPM, fuel trims, and air/fuel ratios.

### What are the key features of JB4 Mobile?

Key features include live gauge monitoring, data logging and graphing, the ability to read and delete diagnostic codes, modify user-adjustable settings like boost and fuel, adjust WMI settings, and switch maps on the fly. It also supports auto WOT logging and JB4 firmware updating.

### Is JB4 Mobile free to use?

Based on the provided information, the JB4 Mobile application is available for free. There are no mentions of in-app purchases or advertisements, suggesting a completely free user experience.

### What vehicles is JB4 Mobile compatible with?

The app is designed for use with vehicles equipped with the JB4 tuner from Burger Motorsports. Users will need to have the JB4 Connect Kit installed in their vehicle to utilize the app's full functionality.

### How can I use JB4 Mobile to tune my car?

JB4 Mobile allows for performance tuning by enabling users to modify user-adjustable settings such as boost and fuel levels, and adjust Water Methanol Injection (WMI) settings. You can also switch between different performance maps directly from the app.

## Version history (last 5 releases)

### 3.0.7 — 2026-01-08

Bug Fix: Viewing User Adj in landscape orientation
Bug Fix: Viewing graph with incompatible parameters.

Minor changes to firmware uploading to make it faster.

### 3.0.6 — 2025-09-12

Map and manual Log button now only appear once connected.

Log/firmware import now auto-refresh file list.

Minor bug fixes.

### 3.0.5 — 2025-09-09

Map and manual Log button now only appear once connected.

Log/firmware import now auto-refresh file list.

### 3.0.4 — 2025-06-02

Updates to theme editor.
Updates to User Adj/WMI saving.
Minor error message updates.

### 3.0.3 — 2025-03-17

Updated JB4 boost scalars.
Updated Email handling.
Updated default themes.
Added CANFlap and Map gauges.

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## More apps by Dmac Mobile Developments, LLC

- [Fuel-It! ECA](https://appshunter.io/ios/app/fuel-it-eca/id1004246767)

All apps by Dmac Mobile Developments, LLC: https://appshunter.io/developer/372235786

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*