KDIAG is a Bluetooth-enabled vehicle diagnostic tool from Shenzhen Jiawei Hengxin Technology Co.,Ltd. It captures fault codes, vehicle data streams, and other information to enable smarter maintenance with a growing user base reflected in 50,000+ total downloads and 4.4K downloads in the last 30 days.
Pros & Cons
Free to use with no upfront price
Bluetooth-enabled diagnostics for wireless use
Reads fault codes and analyzes data streams for maintenance
Growing user base and recent activity
Not ranked in top app lists
Less emphasis on OBD/ECU-focused terms compared with some competitors
Broad set of permissions may raise privacy considerations
About KDIAG
KDIAG is a tools app developed by Shenzhen Jiawei Hengxin Technology Co.,Ltd.
How many times has KDIAG been downloaded?
KDIAG has been downloaded 85 thousand times. In the last 30 days, the app was downloaded 4.4 thousand times.
What is the rating of KDIAG?
KDIAG is rated 3.79 out of 5 stars, based on 520 ratings.
Is KDIAG free?
KDIAG is free to download. The APK download size is 74.11 MB. The latest version available is 1.6.17. The last update was on June 2, 2026.
What are the requirements for KDIAG?
The app has a content rating of Medium Maturity. The app has been available on Google Play February 2025.
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KONNWEI has three apps for their BT scan tool! KDIG and MAXOBD2 require the BT dongle to be plugged into the vehicle's OBD2 port. Both apps require permissions to be set manually within the app settings menu to work. KDIG app instructions say user should not connect BT dongle to phone BT and should use function to connect BT within the app!
★★★★★Heulwen Van Wyk· Oct 31, 2025
Very good app but please add the Alfa Romeo because I see there is Bugatti but no alfa?
★★★★★Сотир Сотиров· Dec 4, 2024
App works perfect! I have problem with the Opel brand with professional diagnostic. I can't connect to Opel Astra J.
★★★★☆Lateef Olayinka· Jul 13, 2025
I think some softwares need to be updated. I can't scan Transmission system of Toyota cars. Transmission function is not there at all. Try to work on Peugeot vehicles too.
★★★★☆Maryan Stoykov· Jan 24, 2026
The Bluetooth device is great but the app lacks the ability to log data and export it to a .csv file for example. It works great with Car Scanner but Car Scanner does not read all PIDs at least on a 2011 Hyundai I30 1.6 CRDI. Can a logging option be added?
★☆☆☆☆R K· Feb 20, 2025
Most functions do not work with KDIG scanner.
★★☆☆☆محمد ظافر· Dec 22, 2025
I've bought it for my InfinitiFX35 2007, but unfortunately, it's too poor for Nissan x Infinite cars. It doesn't even have Autosearch by VIN number for it. It is great with Kia bad with Japanese cars, I guess, because I've tried to use with Mitsubishi, and it won't even read the VIN. It keeps saying that it is out of value, for Korea car it good for Japanese is not the one to GO with.
★☆☆☆☆Sandor· May 8, 2025
Had a lot of hope for KDIG, but it can read neither of my cars. It only shows basic info like every cheap obd does. Unfortunately KDIG OBD is useless, same as the app.
★☆☆☆☆Monwabisi Nojilana· Mar 31, 2025
I bought this device and still can't connect via Bluetooth and the app.I called the konnwei dealer and can't resolve the issue. For me its jst useless and I don't encourage anyone to buy it. Konnwei 903 wireless 5 Bluetooth
★☆☆☆☆A Forrest· Nov 17, 2025
Glad I didn't buy the obd2 connector! The KDIG OBD2 on AliExpress had pictures of it having holden protocols, it doesn't even have holden in it.
Google Play Rankings for KDIAG
This app is not ranked
Technologies used by KDIAG
20 permissions
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Trust & Safety: Requests a broad permission set including location, Bluetooth, storage, and phone state (and some privileged permissions). Ensure these permissions are used solely for diagnostic purposes and provide clear privacy disclosures to users.
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