Obd Mary – Car Scanner for ELM
April 15, 2025
More About Obd Mary – Car Scanner for ELM
Our Car Scanner OBD Mary supports brands like: Acura, Alfa Romeo, Alpina, Audi, BMW, BYD, Buick, Cadillac, Changan, Chery, Chevrolet, Chrysler, Citroen, Dacia, Daewoo, Daihatsu, Daimler, Datsun, Dodge, DS, Exeed, Fiat, Ford, Geely, General Motors, Genesis, GMC, Great Wall, Haval, Holden, Honda, Hummer, Hyundai, Infiniti, ISUZU, JAC, Jaguar, Jeep, JMC, Kia, KTM, Lada, , Lancia, Land Rover, Lexus, Lifan, Lincoln, Lotus, Mahindra, Mazda, McLaren, Mercedes-Benz, Mercury, MG, Mini, Mitsubishi, Nissan, Opel, Peugeot, Pontiac, Porsche, Proton, RAM, Range Rover, Ravon, Renault, Rivian, Rolls-Royce, Rover, Saab, Samsung, Scion, Seat, Skoda, Smart, SsangYong, Subaru, Suzuki, Toyota, Vauxhall, Volkswagen, Volvo
Attention!!!
1. You need ELM327 Bluetooth or Wi-Fi adapter to connect to a vehicle using this application.
2. Your vehicle can contain some ECUs (electronic control modules), so don't forget to check all ECUs.
3. ELM adapters version 2.1 are often can be corrupted, so try to choose version 1.5 if you have a chose.
Quick start guide
1. Download the app
2. Plug in ELM327 adapter into 16-pin diagnostic connector in your vehicle
3. Switch ON ignition
4. Discover your Bluetooth ELM adapter in your Android device settings
5. Select discovered ELM327 adapter in the app settings
6. Try to connect!
Diagnostics
You can read and reset trouble codes from OBD2 compliant control units. Can see fault codes descriptions and search it in internet just by click. Freeze-frame data can be read in case if DTC is activated. You can read live parameters like speed, RPM, MAF, coolant temperature.
Dashboard
Use our OBD2 app as a gauge dashboard. Create your own set of gauges. You can customize approximately all gauge parameters(sizes, colors, positions of stroke, arrow, texts, labels, backgrounds and etc.) Resize and move gauge in edit mode to desired place just using your fingers. Enjoy your style!
Trip computer
Track your trips with our Obd Mary app and ELM327 adapter. Keep the adapter connected all the time inside your car and the app connects to your vehicle and log your trip data:
- trip time;
- fuel consumption;
- fuel cost;
- average speed;
- max speed and etc.
Full version
Buy the full version of the Obd Mary app and get full functionality without an ads. When you are buying the app you support future development and support. Thank you.
The application uses foreground service to have a constant connection with the Wi-Fi or Bluetooth ELM adapter which is used for communication with the modern vehicles when the app is in foregaround or in background state. The app collects data from a vehicle and store it locally to provide user information about average fuel rate, average speed, mileage, trip time and other statistics params even when the app is in a background state.
Contact developer: Fill free to contact us using appropriate button on the main app screen. Use email channel.
Latest Version
1.263
April 15, 2025
OBD Apps
Internet
Android
4,064,836
Free
com.elm.elm327.obd2.eobd.obd.car.scanner.diagnostics.tool.dashboard.doctor.check.engine.torque.speed.trouble.codes.mary
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User Reviews
Jeff R
2 months ago
best obd2 app I have used, simple, and allows me to view advanced data like my misfires
Simon Rice
4 months ago
Connected easily to BMW E36. Good clear dashboard, easy to read and responsive dials. Comprehensive list of sensors. Highly recommended especially for serious amateurs.
Milan Kevac
6 months ago
The application is excellent. I use it for Nissan x-trail. Primarily for monitoring, but also for reading errors that occur occasionally. It connects very quickly, the interface is friendly. All recommendation.
Mark Ashworth
4 months ago
Pants. Doesn't connect to Elm327. I've downloaded countless OBD diagnostic apps and almost everyone has connected to my ELM327 adapter no problem. This is the only app that doesn't. I'll stick with much more reliable Torque thanks.
Fland More
5 months ago
Auto zone couldnt read the codes, Mary did. Saved me hundreds avoiding the usual alternatives. Escape and Mariner, both hybrids which can be tricky. A breeze with Mary. Simple install, no headsches and all the monitoring options I hoped for. Cant say enough, thank yous.
Chris Kaufman
5 months ago
I have been using this app for years without fail. I like it so well I bought the full version. One of the only apps I've found that clears everything on my Dodge truck, including alerts in the overhead display. I will continue to recommend to others.
Adrian Claudiu Pana
3 months ago
On Motorola Edge 40 the app freezes, unable to reconnect after interruptions, screen app shudders, becomes unresponsive. Many pre 2005 cars not supported. Can be made to look nice, many customizations. After update fuel consumption not shown.
Ian Davies
2 months ago
nice dashboard, however not a patch on SZ scanner for Suzuki. Incorrect faults identified,phantom faults identified , didn't clear codes when it said it had, not user friendly (I work in IT!) freezes, poor connection to Carista module. too late for a refund, useless app 🙄
HJ Normey
2 months ago
Of all the ODB apps tried - and they are many - ODB Mary is consistently *solid* - used to connect to a Smart 450 (second, first generation, so to speak) and it connects without a hitch. Even using less-than-ideal ODB adapters.- The real-time metrics feature and very customizable trip statistics are great. But, that'd be worth nothing were it not for the fact that the connectivity is rock solid. Very very recommended application.-
A Google user
5 years ago
this app refused to quit when I chose to quit all my apps. there's no obvious way in the app itself to quit. and it continues permanently to display an icon in the top-left of my Android screen with no way to remove it without uninstalling the program which is what I'm going to do right now. I highly advise not using this program unless you prefer to have this program running permanently on your phone.
Ti Le
4 years ago
Easy to use and clear obd reader but they will send you an offer in app that if you answer a few feedback questions and give a good rating that they will unlock the app and give you full access. This is a lie. I answered the questions and initially provided a good rating bc the limited features provided work and it was a good offer for full access. But you don't get the benefits of a high rating when you mislead your users.
Kenenth Morgan
4 years ago
I will not give a poor review since I didn't utilize all the functions of the app. But I was disappointed the app requires purchase of the full version to test the functionality of some basic features (for instance... trouble codes). The app did give me a free function if I gave a review.. that was before I tried the app. BTW (if it helps anyone) I used an OBDLink MX+ Bluetooth dongle to connect and worked perfectly. Otherwise I will be uninstalling and moving on.
Michael Elkin
2 years ago
Best i could find so far. You need to pair from the app, not Android or it did not work. But then it could connect. The gauges where slow to update, but the add guage screen shows all values and updates much faster. Also, it suggests grouped requests, but i found it to be better with grouped off.
Larry Gosselin
2 years ago
Using the free version. When I first got this App I could both read diagnostic codes and clear them. With more recent versions I can still read codes but am no longer able to clear them. With the last coupe versions the screens have changed and the screen to clear codes no longer is available . I now get a screen indicating that I need to purchase the full version to get this functionality.
Leo Co
2 years ago
Paid for the full version, but the app freezes and disconnects when selecting options. There is no real technical advantage for this application other than to see what is wrong. There is no guidance with correcting the issues or digging deeper to resolve the major problems. It really only tells you what the problem is and that's all.
Enrico de Rojas
1 year ago
Worked for a few weeks and both cars, but now will not connect to either of my vehicles. Sent emails via the App but no response. Plus no way on Google Play to Re-Install, only option is to uninstall. I use the wireless ELM 327 connector. Works fine on buddy;s phone with his Torque App. I paid for the Upgrade, but it keeps telling me to Upgrade and when I clik that option nothing happens. No on-line support, no on-line user manual, suggest you find a better App
mk
1 year ago
this app has been instrumental to resolving the error codes that my 03 Infiniti G35 had. the interface is very user friendly, The trouble code scanner is the best I've seen in any app (full version or not), and I didn't expect this app to continue to be so useful, but the trip log feature (thats surprisingly comprehensive, even in the free version) takes the cake. so useful for logging fuel economy/miles traveled for my job that requires lots of driving. Try this app. you wont regret it!!
Jon Musselwhite (Flipping Binary)
2 years ago
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 like this. I just want a simple app that reads error codes and tracks car activity automatically. Hopefully this will be fixed. Then this would be a five star app.
Bobby S
4 years ago
The app would not connect to the ECU without data... I have two Galaxy j7s, same exact model, so I put this app on the one without data to act as the scanner and it would time out every time... Tried it on the phone with data and it connected right away... What gives? ALSO: It will read the codes but you can only see 1. The others are hidden unless you pay. The free app 'Car Scanner' pulled all mine for free and it's easy to export to text file. Avoid if you are just looking to pull CEL codes.
Bob Cunningham
1 year ago
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 can, you should! My 2012 Mazda is starting to show it's age, and I wanted to more closely monitor its performance and also check the error codes that occasionally pop up then go away.
