# MultiGauge > Vehicle sensor data display app for PLX Devices Multi Gauge Link hardware. (iPhone/iPad app by PLX Devices, INC..) - Source: https://appshunter.io/ios/app/multigauge/id1160471122 (this page in markdown: same URL + `.md`) - Developer: [PLX Devices, INC.](https://appshunter.io/developer/388327605) - Category: Utilities, Productivity - Price: Free - Rating: 1.00/5 from 4 App Store ratings · 30 written reviews indexed - Age rating: 4+ - Requires: iOS 12.1 · 10 MB - Languages: American English - Released: 2016-10-04 - Data updated: 2026-06-11 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/multigauge/id1160471122/reviews.md ## What is MultiGauge? 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 ## Key features - Real-time sensor data display - Bluetooth LE connectivity - Supports multiple sensor modules - Visualizes engine parameters - Compatible with PLX Devices hardware ## Recent user reviews (10 of 30) All indexed reviews: https://appshunter.io/ios/app/multigauge/id1160471122/reviews.md ### 1/5 — Worthless *2025-06-20, version 2.1.1* Installed app and it worked fine on android. Now it opens and connects then immediately closes out with no error message or anything. Open app again and same thing, uninstalled. ### 1/5 — App was upgraded and now its useless keeps crashing *2023-03-19, version 2.1.1* App keeps crashing after upgrading ### 1/5 — Poor App lets the whole thing down *2021-11-24, version 2.0.2* The hardware part is great but the app lets the whole system down, crashes constantly when used on my iPhone XS. I then have to close the app and restart and reconnect only for it to crash again. It’s a real shame as it has so much potential but the constant crashing renders it useless. ### 1/5 — Terrible product *2020-08-04, version 2.0.2* 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. ### 1/5 — Crashes *2020-08-03, version 2.0.2* App freezes or crashes within 30 seconds of starting the car. I purchased the analog gauge and it works fine. The app needs to be fixed. ### 1/5 — Landscape mode only *2020-05-25, version 2.0.2* Still works on my iPad but I have to rotate my head 90 degrees to read it. Please allow portrait mode before I have a crash. ### 5/5 — Orientation *2020-04-18, version 2.0.2* Please make it so that you can use the app when your phone is upright and not just horizontal, other than that apple CarPlay would be nice and the afr kit works great ### 2/5 — Crashing *2020-02-26, version 2.0.2* App is crashing every few minutes. iPhone 10s ### 1/5 — Freezes *2020-02-25, version 2.0.2* 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. ### 1/5 — Don’t update your app! *2020-02-09, version 2.0.2* Updated my app and now it freezes up constantly. ## Frequently asked questions about MultiGauge ### What does the MultiGauge app do? The MultiGauge app connects to the PLX Devices Multi Gauge Link hardware interface via Bluetooth LE. It allows you to view real-time sensor data from your vehicle, such as air-fuel ratio, temperatures, and pressures, directly on your smartphone. ### What hardware is compatible with this app? This app is designed to work with the PLX Devices Multi Gauge Link. It also supports various sensor modules like the SM-PRO (for Fluid Temp, Exhaust Gas Temp, Air Intake Temp, Fluid Pressure, Vac/Boost) and the SM-AFR (for Wideband Air/Fuel Ratio). ### How much does the MultiGauge app cost? Based on the provided information, the MultiGauge app is free to download and use. There are no mentions of in-app purchases or subscription fees for the application itself. ### What are the benefits of using this app for car tuning? This app provides real-time visual feedback on critical engine parameters like air-fuel ratio and boost pressure. This allows tuners to accurately monitor performance, identify potential issues, and make informed adjustments for optimal engine operation. ### Can I use this app without the Multi Gauge Link hardware? No, the MultiGauge app is specifically designed to function with the PLX Devices Multi Gauge Link hardware interface. It relies on this hardware to receive and transmit sensor data wirelessly to your smartphone. ## Version history (last 5 releases) ### 2.1.1 — 2022-01-24 Bug fixes and performance improvements. ### 2.1.0 — 2022-01-21 1. Support new BGX Module. 2. Bug fixes and performance improvements. ### 2.0.2 — 2019-05-17 *Support SMPRO combined sensor module. *Support multiple sensor modules in daisy-chain. *User interface redesign. *Bug fixes and performance improvements. ### 2.0.1 — 2019-05-16 *Support SMPRO combined sensor module. *Support multiple sensor modules in daisy-chain. *User interface redesign. *Bug fixes and performance improvements. ### 2.0.0 — 2019-05-11 *Support SMPRO combined sensor module. *Support multiple sensor modules in daisy-chain. *User interface redesign. *Bug fixes and performance improvements. ## Apps similar to MultiGauge | App | Rating | Price | Category | | --- | --- | --- | --- | | [CalcuLatte](https://appshunter.io/ios/app/calculatte/id1464511080) | — | Free | Utilities | | [Veronique](https://appshunter.io/ios/app/veronique/id1459914360) | — | Free | Utilities | | [Siemens Healthineers Events](https://appshunter.io/ios/app/siemens-healthineers-events/id1462867980) | — | Free | Utilities | | [D4H Personnel & Training](https://appshunter.io/ios/app/d4h-personnel-and-training/id1456365440) | 3.0 (11) | Free | Utilities | | [Livly Hub](https://appshunter.io/ios/app/livly-hub/id1464225200) | 4.7 (13) | Free | Utilities | | [Calendar Clock](https://appshunter.io/ios/app/calendar-clock/id1451445740) | — | $0.99 | Utilities | ## More apps by PLX Devices, INC. - [Kiwi3 OTA](https://appshunter.io/ios/app/kiwi3-ota/id1144750757) - [Kiwi OBD](https://appshunter.io/ios/app/kiwi-obd/id1317045971) - [Legion Solar](https://appshunter.io/ios/app/legion-solar/id1418030840) - [XFoil](https://appshunter.io/ios/app/xfoil/id1672661311) - [PLX Devices BT LE Programmer](https://appshunter.io/ios/app/plx-devices-bt-le-programmer/id6737182255) All apps by PLX Devices, INC.: https://appshunter.io/developer/388327605 ## Related topics [boost gauge](https://appshunter.io/ios/topics/boost-gauge) · [gauge](https://appshunter.io/ios/topics/gauge) · [catalyst by metricwire](https://appshunter.io/ios/topics/catalyst-by-metricwire) · [gauges](https://appshunter.io/ios/topics/gauges) · [airgas srvs](https://appshunter.io/ios/topics/airgas-srvs) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-11.*