JB4 PRO
Exclusively for the JB4
Free
Smart phone integration for your JB4 performance tuner to change maps, monitor live engine data, record logs, manage fault codes, update JB4 firmware, and much more!
Note the JB4 PRO free app requires the JB4 PRO BT adapter and is not compatible with the JB4 Mobile BT adapter.
more Minor bug fixes
1.5.0 1 Jul
1) Added auto/normal/fast option for JB4 baud speed under settings
2) Added additional JB4 platform map guides
1.4.9 6 Jun
1) Added BLE permission prompt for iOS when permissions are not enabled
2) Adjusted map guides
3) Adjustments to BLE speed switching logic
1.4.8 1 May
1) Added support for upcoming JB4PRO hardware high speed data mode.
2) Minor adjustments to improve app communications.
1.4.5 7 Apr
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.
1.4.3 1 Apr
Fixed bug with disconnection in background mode
1.4.1 2 Mar
Fixed bug in log view that warns of fuel trim variance when there isn't one.
1.4.0 18 Feb
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.
1.3.9 14 Feb
1) Import settings from external log
2) Minor bug fixes
1.3.8 01/11/2025
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.
1.3.7 20/10/2025
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
1.3.6 04/10/2025
Minor bug fixes
1.3.3 11/08/2025
Improvements to log/chart viewing
Added metric gauge option under settings
1.3.2 19/07/2025
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
1.3.0 09/07/2025
1) Improved log view scrolling/tracking
2) Made automotive gauge needle larger so its easier to read
1.2.9 24/06/2025
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
1.2.7 14/06/2025
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.
1.2.6 11/06/2025
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.
1.2.4 05/06/2025
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.
1.2.3 27/05/2025
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 26/05/2025
Minor bug fixes
more Version 1.5.0 1 Jul
Data Not Collected The developer does not collect any data from this app.