iPhone Screenshots


MultiGauge App is designed to function with the PLX Devices Multi Gauge Link hardware interface. The Multi Gauge Link includes a Bluetooth LE wireless communication protocol designed to work seamlessly with this app. PLX Devices sensor modules can be connected in a daisy-chain and the Multi Gauge Link is connected to the last sensor module in the chain to transmit sensor data to your smart phone for visual display.
Compatible Hardware:
Multi Gauge Link
SM-PRO - Fluid Temp, Exhaust Gas Temp, Air Intake Temp, Fluid Pressure, Vac/Boost
SM-AFR - Wideband Air/Fuel Ratio Sensor Module

Compatible Hardware Combinations:
SM-AFR + MultiGauge Link.
SM-Vac/Boost + MultiGauge Link.
SM-AFR + SM-Vac/Boost + MultiGauge Link.
SM-PRO + SM-AFR + MultiGauge Link
SM-PRO + MultiGauge Link

SM-Pro is a combined sensor module for accurately measuring Vac/Boost, Exhaust Gas Temperature, Air Intake Temperature, Fluid (Oil/Water) Temperature, and Fluid Pressure. Includes genuine Honeywell 3Bar Vac/Boost sensor (built-in), wires/connectors for digital interface with DM-6, DM-100/200, MultiGauge Link. Also includes analog outputs for interfacing with 3rd party ECU's and data loggers.

The SM-AFR Gen4  Sensor Module is a tuner grade Bosch LSU 4.9 wideband oxygen sensor controller with digital/analog outputs for 3rd interface. Accurately reads the air/fuel ratio of any internal combustion from 0.68 Lambda to 1.36 Lambda (10:1 - 20:1 AFR *Gasoline). Fully plug and play, no sensor calibration is required. Compatible with Gasoline, Diesel, Ethanol, Methanol, E85, LPG, CNG. Accurate to 0.1AFR with less than 100mS reaction time from rail to rail. Advanced sensor health monitoring, displays oxygen sensor health and reaction time when connected to DM-6 gauge or to your smartphone via the Multi Gauge Link interface.

The SM-Vac/Boost Sensor Module accurately measures the vacuum pressure and boost pressure of any intake manifold. This is ideal for turbo and supercharged applications where monitoring the intake pressure is vital. The Vacuum / Boost Sensor Module can also be used as a stand alone unit capable of interfacing with 3rd party hardware where both the digital output and the analog output are available simultaneously. Its measurement range is 30.5 inHg to 30 PSI or 760 mmHg to 2.11 Kg/cm^2. Connect this sensor module via the Multi Gauge Link interface for a boost gauge on your smartphone.
For more information visit www.plxdevices.com

What’s New

Version 2.0.2

*Support SMPRO combined sensor module.
*Support multiple sensor modules in daisy-chain.
*User interface redesign.
*Bug fixes and performance improvements.

Ratings and Reviews

2.3 out of 5
21 Ratings

21 Ratings

blabbblllaaa ,

Latest update ruined this app

With the addition of the SM-Pro the app was Re-written and from that I can see wasn’t QC’d much if any.
There is no keep alive in this version so get used to your screen going black in 30 seconds or so. This is a pain if you plan to use this app in any vehicle while driving.
The middle gauge stutters no matter what gauge you select (this is on an XS Max, no CPU is not an issue). The boost function is grossly off as in it registers 4-5 lbs of boost when there is 13-14 (yes all the vacuum lines are snug). Vacuum pressure seems fine.
If you get a phone call the app will freeze and hang up completely. The list goes on.
I really hope they correct these issues as I am out over $500 now on a pretty much useless set of products.

Robfzz ,

Terrible product

PLX's mission statement is "to design the world's most innovative products and deliver a world class customer experience”
PLX Multigauge falls incredible short of that goal. Dealt with their support team for more than a month, trying different IOS devices and IOS releases. At best, I can get about three seconds of data before the app freezes (the controller continues to put out the correct voltage levels). Sent the unit back to PLX, and they reported that “it worked perfectly”. Apparently they don’t consider the software to be part of their product. An awful experience, time lost and money down the drain.

myafrdoesntwork ,


Tried multiple apple devices and always freezes. Support still hasn’t fixed, still haven’t been able to use device and had it for 7 months. Now just gonna wait and hopefully they do an update to app.

App Privacy

The developer, PLX Devices, INC., has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

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

More By This Developer

You May Also Like