JB4 PRO

Name: JB4 PRO
Rating: 4.4 (14 reviews)
Author: Burger Motorsports, Inc

by Burger Motorsports, Inc

iPhone · iPad

Active Last checked 31 Jul 2026

App Store ↗

Quick verdict

What it is: Store information collected; independent summary not yet available.
At a glance: Free to download

Categories and search queries

Official categories

Sports
Utilities

AppCorpus categories

Key functions

Function	Availability	Access	Scope	Evidence
Free app	Yes	Free	—	Store published

Screens

App Store

7 store screenshots

Pricing & paywalls

App Store

Shown for US

Free

Last verified 31 Jul 2026

Ratings & reviews

App Store

Shown for US

4.4 14 ratings · App Store

4/5Good app, some bugs
Overall this is a great app. It could be easier to identify which firmware profiles you need and how to make changes. Clearing DME codes doesn’t work consistently. And it would be amazing if this could be CarPlay compatible, even just a gauge widget. Allow volunteers to help with Dev!

johntfetter · 31 Jul 2026
5/5Data logging
The app and data logging works great just like the mobile, but I’m on platform 125 (2.5T smartstream kia/hyundai) and for whatever reason when I’m reading a data log, it does not give me the option to enable cylinder one or “ign1” to see timing for cylinder one it’s not even in the options. List to be enabled when reading a data log.

JA_16 · 31 Jul 2026
3/5What are you waiting to develop a CarPlay compatible app??
Hey guys what are you waiting to develop a CarPlay compatible app?? It’s kind of basic to have nowadays those engine values in the screen of the car while you race!

Max BD22cm · 31 Jul 2026

Privacy & accessibility

App Store

Privacy

Data Not Collected Developer declared

Accessibility

No accessibility labels collected yet.

Versions

App Store

1.0
1.2
1) Added additional JB4 map descriptions 2) Fixed small gauge scaling in landscape mode 3) When opening logs to view the system will not jump to the last run in the log 4) Auto logging starts sooner after pressing down the gas pedal
1.2.3
1) Adjusted chart gauges so description appears below data rather than below chart. 2) Added connection check for JB4 Mobile adapters to prompt the user that they are not supported with this app.
1.2.4
1) Added log analysis. First checks in place cover boost vs safety, AFR, FP_H, and fuel trims. Will expand the parameters as feedback comes in 2) Auto logging now captures one second before you press the gas pedal down to better capture launches and what was happening before you floored it. 3) Added map descriptions for various platforms that were missing them.
1.2.6
1) Added engine warmup indicator. Uses oil temp if available, otherwise water temp. It can be disabled on the settings page. 2) Added a button when viewing logs so you can quickly reference settings for that specific log.
1.2.7
1) Redesigned ring gauge style for a more modern look 2) Added automotive gauge style 3) Added user-adjustable gauge accent color options 4) Fixed bug with text only gauges changing text size
1.2.9
1) Improved log view scrolling/tracking 2) Made automotive gauge needle larger so its easier to read
1.3.0
1) Bug fix for reading JB4 map at app startup for systems without PRO compatible firmware loaded 2) Fixed CANflap command for compatible BMW applications
1.3.2
Improvements to log/chart viewing Added metric gauge option under settings
1.3.3
Minor bug fixes
1.3.6
1) Added more default map and setting descriptions 2) Fixed bugs around viewing setting data under logs 3) Added "slow speed BLE" option for systems that drop data packets or have issues updating firmware at high speed
1.3.7
Entirely new JB4 gauge profile system! Select preset gauge profiles, create your own gauge profiles, and share gauge profiles with friends! Use the new pencil button to open the gauge profile manager and see our recent youtube video on how to navigate the new system if you have any questions.
1.3.8
1) Import settings from external log 2) Minor bug fixes
1.3.9
1) Changed firmware download to internal BMS database 2) Changed Trims/Trims2/Timing to Fuel Trims/Fuel Trims2/Ign1. Reselect these gauges in your preset gauge templates for data to show properly. 3) Adjusted Fuel Trims scaling to reflect -34 to +34 typical automotive scaling. The CSV log will still store previous 0-50 format for backward app compatibility.
1.4.0
Fixed bug in log view that warns of fuel trim variance when there isn't one.
1.4.1
Fixed bug with disconnection in background mode
1.4.3
1) Fixed bug with firmware loading impacting JB4PRO systems. 2) Added support for upcoming JB4PRO background logging. 3) Redesigned dev/error log system to allow up to 20k entries and not reset when app is closed. 4) Various minor bug fixes.
1.4.5
1) Added support for upcoming JB4PRO hardware high speed data mode. 2) Minor adjustments to improve app communications.
1.4.8
1) Added BLE permission prompt for iOS when permissions are not enabled 2) Adjusted map guides 3) Adjustments to BLE speed switching logic
1.4.9
1) Added auto/normal/fast option for JB4 baud speed under settings 2) Added additional JB4 platform map guides
1.5.0 · 1 Jul 2026
Minor bug fixes

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Alternatives

dragy·Lap - New GPS Lap Timer — Same category + similar ratings

Availability by market

No LIVE observation for DE yet.

Data quality & evidence

Page completeness: Live store listing
Last verified: 31 Jul 2026
Sources: App Store

Independent summary has not been published yet.

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Example prompt

Compare JB4 PRO with dragy·Lap - New GPS Lap Timer.

View JSON

GET /api/v3/apps/6746129072

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    },
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    },
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    },
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    },
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  "alternatives": [
    {
      "app_id": 1617703369,
      "name": "dragy·Lap - New GPS Lap Timer",
      "url": "https://appcorpus.com/apps/dragylap-new-gps-lap-timer-1617703369",
      "reason": "Same category + similar ratings"
    }
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