613 reviews
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About this app

JB4 Mobile is a mobile data logger and display for use with the JB4 piggyback tuner from Burger Motorsports.

To connect, simply attach the JB4 data cable to your device using an OTG cable.
***Use a good quality OTG cable to avoid connection issues.
***If you keep getting "Serial port not available" errors, 1 of these issues is probably the cause:
1) Your OTG cable is faulty
2) Your device either doesn't support OTG properly or requires a powered USB hub
3) You're using a Galaxy S6/S6 Edge (see below)

Galaxy S6/S6 Edge Owners using an OTG cable: It has come to my attention that to get these devices to work correctly, you must first connect the OTG cable to your device, THEN connect the JB4 cable, THEN open the app and connect. Not sure why these devices are so picky, but at least someone found a workaround.

JB4 Mobile allows you to monitor multiple parameters of your JB4 equipped car at once. Parameters such as boost psi, rpm, fuel trims, air/fuel ratios, ignition advance, fuel pressure and much more are all available.

Current Features:
Data Monitoring
Data logging (log files are fully compatible with JB4 Windows/OS X software)
Data Graphing
Email and rename saved logs
Read/Delete codes
View previously read codes
Modify boost/fuel mapping
Modify methanol settings
Switch maps on the fly
Auto WOT logging
GPS Speedometer
G Force Meter
JB4 Firmware Updating
Landscape Support

How to calibrate the G Force meter:
1) Make sure your device is mounted in your vehicle in a (mostly) upright position (portrait only support for now).
2) Select a G Force gauge on the display screen.
3) When the vehicle is at a complete stop on a flat surface, simply double tap on the G Force gauge.
4) When the dot is centered in the circle with the car at a flat rest you know it is calibrated.

To switch what a gauge displays, just tap and hold on that gauge and a menu will appear.

To view your max boost, simply double tap on the boost gauge (double tap again to view live boost, max boost is reset after viewing).

JB4 Mobile is not affiliated with Burger Motorsports.
Updated on
Nov 3, 2021

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info and App info and performance
Data is encrypted in transit
You can request that data be deleted
613 reviews
July 22, 2021
Does it's job very well with little issues. Occasional crash when pushing new tune settings in, and the resolution can get screwed up if you flip to portrait and landscape too many times really quickly. Every very minor bug is fixed with a restart of the app. JB4 Support is amazing. The system has made our 2019 VW rocket like it should have from the factory. It is loads of fun fine tuning your map bit-by-bit and getting more power, economy, and fun. Hands down recommend!
14 people found this review helpful
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Dmac Mobile Developments, LLC
September 8, 2021
So glad you're finding the app useful. Please be sure to submit any crash reports to us so we can squash those bugs. Thank you for the review! :)
A Google user
September 7, 2019
Works well, zero connection issues. I believe the placement of the Bluetooth adapter on the JB4 is the reason for some issues people are having. I placed mine where the install instructions recommend and have never had a single failure to connect. This thing makes a very noticable difference and increase the fun factor of driving my vehicle. I can't imagine driving without it now. Zero fault codes because of the JB4. Worth the money and definitely go for the Bluetooth/app combo.
19 people found this review helpful
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Dmac Mobile Developments, LLC
October 28, 2019
Awesome, glad you're enjoying it! The proper install location makes ALL the difference. Thanks for the review!
Erik Anderson
September 7, 2020
This app makes data logging and making adjustments extremely easy. The ability to view active readings of basically any 6 pieces of data on the car you want is great as well. Customer service helped me work through a connection problem that I was having to my tablet and was very pleasant to work with. Even though I have the free software for data logging on my computer to have it so easily available with a tablet is awesome. I’d definitely spend the money on it again!
18 people found this review helpful
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What's new

Android 12 support.