Install the WeChat app: You can download and install WeChat for free from the App Store or from iTunes. See this guide for details on how to install apps on your device.
Launch the app: Once you've installed WeChat, open it from your Home screen.
Tap the "Sign Up" button: This will open the account creation screen.
Enter your region and phone number: Make sure that you enter your phone number correctly, as this will be required to send you a confirmation code. Tap "Sign Up" once you have finished.