4.0
419 reviews
50K+
Downloads
Content rating
Teen
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image

About this app

KDIAG is an app for diagnosing vehicles. It uses advanced hardware and software technology to send data to the car via Bluetooth, collect fault codes, data streams and other information on the vehicle, and provide better data analysis for vehicle maintenance.
Updated on
Nov 19, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection
Data is encrypted in transit
Data can’t be deleted

Ratings and reviews

4.0
390 reviews
محمد ظافر
December 22, 2025
I've bought it for my InfinitiFX35 2007, but unfortunately, it's too poor for Nissan x Infiniti 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.
Did you find this helpful?
Marietta Nelson
January 3, 2026
KONNWEI has three apps for their BT scantool! KDIAG 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. KDIAG app instructions say user should not connect BT dongle to phone BT and should use function to connect BT within the app!
Did you find this helpful?
Super Boost
November 15, 2025
An app that does what it says in most cases. Ironic that my diagnostic reader from KDiag refuses to read Asian brands. Also no updates in the two years since I had started using it. But worth the money since most other brands are supported
Did you find this helpful?

What’s new

Optimization program