Reviews for Obd Mary – Car Scanner for ELM

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20 reviews

Review by Lee Puddifoot
(5/5)June 24, 2024

Very customisable app. Loads up nice and quickly and connects to my Bluetooth obd module. I have been using it on my Renault Clio mk2, 2003 to keep and eye on engine temperature, fuel consumption and trip distance, it seems to be 100% correct. It’s interesting to see what info is displayed in the app, […]

Review by Evan Swingle
(5/5)June 12, 2025

Works great! I went through about 10 apps trying to find an OBD2 scanner that’d let me do a basic scan for free, and this one fits the bill, plus letting you view a bunch of extra diagnostic info.

Review by Fariborz Goodarzi
(1/5)May 22, 2025

App starts with ads which doesn’t allow you to close it and you have to wait for several ads to be displayed. This app advertise that you can scan ABS system but there is not such a feature. Disappointing.

Review by Devboy Nerdfest
(5/5)May 11, 2025

I find that this app is the best way to actually find out what’s going on with your engine.I also has some really cool amenities like keeping track of your trips and recording statistics on different mechanical operations.

Review by Colin Almond
(5/5)June 24, 2025

For free software, this is very impressive. I have been using this with a cheap OBD reader to monitor the pressure drop across my DPF (particulate filter). There area vast number of parameters that can be measured, so is possible to work out what is going on in the engine.

Review by Kevin Davis
(5/5)July 22, 2025

Really great app. It reads and lists out everything in a simple and understandable way.

Review by Lewis “Lewis Flynn” Truelove
(5/5)May 11, 2025

fantastic and efficient app. the application for Ur scanner is easy to follow and understand as well as the ability to quickly change car profiles if looking at multiple vehicles that are a different model. could not fault this app thank you !!! you have helped save me hundreds by understanding what’s wrong with my […]

Review by edward garabedian
(5/5)September 21, 2025

overall a good easy to read user interface. Will update after I start getting more into the app functionality.

Review by joshua bibby
(5/5)May 30, 2025

The free edition gives you more than most of the other scanner apps but the paid edition is significantly better. The MPG function is my favorite since it calculated it in real time to save you money. The money you save with this app will pay for it many times over!!

Review by Ian McCluskey
(5/5)June 2, 2025

TOTALLY CUSTOMIZABLE! Does far more than expected, and does it well 😃 My old Vauxhall Astra has no temperature guage so I thought I’d get one of these ELM devices. Tried a few other OBD-2 apps, all offered very little but this one tells me just about EVERYTHING you’d want to know – Engine temperature, […]

Review by Suhail Mohammed
(5/5)June 20, 2025

Simple, easy to use, and packed with features. I’ve been using this on my Subaru to monitor diagnostics and track trip performance. It not only helps read and clear engine codes, but also gives valuable insights into the car’s health—offering peace of mind without costly trips to the mechanic.

Review by Peter Cardow
(2/5)August 1, 2025

can’t pay with card in the app to unlock and get rid of adds… App looks fine so fare, but the adds drives me crazy 😧

Review by Philip Alexander Redhead
(5/5)July 23, 2025

my transporter had a fault and found the app easy to use and would definitely be using this in the future. others apps didn’t work but this one was perfect for the job

Review by Gabriele Gorla
(5/5)July 25, 2025

Great app! I was able to diagnose and repair both my Ford focus and my Fiat 500. The app is easy to use with an intuitive interface and good functionality. I am using a generic elm wifi interface from aliexpress.

Review by Pasi Mustalahti
(1/5)September 1, 2025

Stupid ad. got to shut and restart the program, when the ad jumps on screen. With these prices I’ll rather go and buy an OBD device and don’t use any Android program.

Review by Jeff Phillips
(3/5)September 26, 2025

works but for fuel rail pressure it’s in Pa with 7 decimal places and e7 so off screen and unreadable. Lazy coding, like measuring NY to LA in inches. kPa, MPa or Bar with just 1 or 2 decimals would be better. Nevertheless it connected up where other apps wouldn’t.

Review by Greg Burrell
(3/5)July 10, 2025

Handy app but buggy. Nice options for gauge design and lots of customization options. But paid version still shows ads, and keeps reloading the dashboard over itself. Some gauges show zero or NaN after a while, then you have to reconnect. Screen doesn’t always fit properly so some info ends up behind the top bar […]

Review by Morgan “The Captain” Gallupe-Paton
(5/5)July 25, 2025

Best, mostly free app to pair with an OBD scanner in a car. Tried a few apps and this one gave the most functionality for free and has a lot of features in the full version. Even the price to get the full version is very reasonable compared to the other apps available and I’ll […]

Review by Bob Cunningham
(5/5)November 16, 2023

There are many good OBD apps available, but OBD Mary is just a bit better than the rest. Better UI, better features, better performance. I especially like how much better the free version is than the free versions of the other OBD apps. You don’t “need” to upgrade from the free version, but if you […]

Review by Jon Musselwhite (Flipping Binary)
(4/5)October 24, 2022

My Samsung Galaxy S21 complains about this app “overloading the system” every day when it’s not even in use. It’ll hit 25% CPU utilization. Maybe it’s the periodic report feature that does that. If so, it should do the work incrementally and break it apart into small chunks so it doesn’t hit the processor hard […]