Here is the guide to install, register and activate Launch EZcheck scanner EZDiag software App to work with iPhone.
Original Launch EZcheck Launch EZ Check OBDII Scan Tool
Launch EZcheck is a new diagnostic code reader trusted by mechanics and developed by Professional Engineers in 2017. Having complete access to engine control units, it ia as easy to use as handheld code reader plus the benefits of your smartphones. Once plugged into your vehicle's 16pin OBDII DLC, the unit will power up and prompt you to start your ignition. If your vehicle has a Check Engine Light comes on, you can use EZcheck to read the error codes, find out what the problem is, and perhaps fix it. Save your time and money before going to a workshop.
Launch EZcheck is a new design OBDII Scanner. X431 EZcheck work with phone same as Launch Easydiag and Launch M-diag. You directly download “EZdiag” app from Android or Iphone will be ok. EZcheck can read fault code and clear code same as X431 Easydiag and X431 M-diag.

First you can scan the QR code on user manual to download the App on iOS or Android APP Store for Free. You can also search Launch x431 EZDiag app on your mobile search engine and install it.


Open Launch x431 EZcheck EZDiag software application

Sign up Launch x431 EZDiag with user name and password.


Enter your email address (for login or retrieving password)

Choose your region

Set password (At least 6 digit containing numbers, letters and signs)

Activate the EZDiag

Enter serial number and verification code (you can find S/N on the package)

Activation success.



Launch EZcheck is a new diagnostic code reader trusted by mechanics and developed by Professional Engineers in 2017. Having complete access to engine control units, it ia as easy to use as handheld code reader plus the benefits of your smartphones. Once plugged into your vehicle's 16pin OBDII DLC, the unit will power up and prompt you to start your ignition. If your vehicle has a Check Engine Light comes on, you can use EZcheck to read the error codes, find out what the problem is, and perhaps fix it. Save your time and money before going to a workshop.
Launch EZcheck is a new design OBDII Scanner. X431 EZcheck work with phone same as Launch Easydiag and Launch M-diag. You directly download “EZdiag” app from Android or Iphone will be ok. EZcheck can read fault code and clear code same as X431 Easydiag and X431 M-diag.
First you can scan the QR code on user manual to download the App on iOS or Android APP Store for Free. You can also search Launch x431 EZDiag app on your mobile search engine and install it.
Open Launch x431 EZcheck EZDiag software application
Sign up Launch x431 EZDiag with user name and password.
Enter your email address (for login or retrieving password)
Choose your region
Set password (At least 6 digit containing numbers, letters and signs)
Activate the EZDiag
Enter serial number and verification code (you can find S/N on the package)
Activation success.
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