UltraGauge Blue is a one-stop end-to-end OBDII (OBD2) Automotive Information Center and Scan Tool.

Requires UltraGauge Blue Adapter and this App!

In short, UltraGauge Blue can:
- Display 100's of OBD2 Gauges
- Display Check Engine Light and Trouble Codes
- Clear Check Engine Light
- Provide alarms on conditions like Check Engine Light/Trouble Codes, time to change oil, over temperature, and much more
- Connect to any OBD2 compliant vehicle. This includes:
-all 1996 and newer cars/light-duty trucks/RVs sold in the US/Canada
-International vehicles which are OBD2 compliant

By implementing the solution from the Mobile Application all the way down to the OBDII connector, it provides:

--> A tested end-to-end solution from the app all the way down to the vehicles network (IT JUST WORKS!)
--> Ultra-High performance by providing bulk operations and command offload down to the OBDII module
-->24x7x365 operations (data is computed/stored even if the mobile device is NOT in the vehicle!)

The key to the solution is the UltraGauge Blue Active Adapter technology. It gathers, computes, and stores information about your vehicle any time the ignition is turned on. As a user, you can view and act on this data via the UltraGauge Mobile Application which automatically connects to the Module via Bluetooth when in range.

Solution requires UltraGauge Application (this App), UltraGauge Blue Bluetooth Hardware Adapter (order online from, and your OBDII compliant vehicle.

What’s New

Version 2.1.9

-Custom Gauges:
--Allow Read only gauges to be activated
--Misc Text cleanup
-Fixed issue related to not displaying Calibration screen
-Fixed issue related to Digital Custom Gauges not displaying values below 0 when Min/Max both set to 0.
-New Blue Adapter Update (Version 1.22 Feb 25 2018)
-Bluetooth Connection Improvements
--Resolved issue related to Min/Max Digital Gauge fix in 2.1.5
--Fix related to ios 11.x suport
--Corner case where Bluetooth connection was dropping immediately after connecting
--Additional fixes:
--When Diesel box was checked (versus Gas) on Vehicle info screen, it was later erroneously reporting that it was set back to Gas.
--Digital Gauges were not honoring the Min/Max values being set for a particular gauge
--When creating a Custom Gauge (MGauge), there were cases where converting a Gauge from UG MX format would cause the Custom Gauge screen to exit

Ratings and Reviews

2.7 out of 5
15 Ratings

15 Ratings

Madone90s ,

The latest iOS has caused connection problems

Since I updated my iOS a week ago, I’ve only been able to connect to the Ultraguage once, and I use it daily. I’ve tried holding the button to pair with my iPhone, but it just won’t connect. I do like the system, but it’s worthless if it won’t connect. Please update the app!

Rich602231 ,

New IOS Affected Bluetooth Connection

Following the recent Apple iOS update, the app and UltraGauge Blue pairs intermittently. Sometimes, the UltraGauge Blue will be connected but the app does not see any connection. Help ?

Btw, when this app is working properly, couple with the UG Blue, it is top rate, very flexible, and dependable, with tons of features. Too bad the recent IOS Apple update put this great device and app on hold for a bit. Looking forward to the UG App update to accommodate the latest Apple IOS update. 👍👍👍👍👍

JUKE179r ,

Great app that you can customize

I really like this app so I can monitor my LR Discovery 2 engine temps, fuel mpg, oxygen sensor voltages, and trouble codes that you can reset from your iPhone. You can add up to 10 gauges a screen to monitor the inner workings of your car or truck.
For the people complaining about lack of Bluetooth connectivity, just turn off your Bluetooth on your iPhone and then turn it back on for the app the recognize the dongle. Easy peasey...


Metin Sagal
10.8 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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