First, install InTouchApp on your phone:
Step 1 - Download & Install InTouchApp on your phone. Download here
Step 2 - Sign up with your phone number
Second, install InTouchApp Extension for Chrome:
Step 1 - Install Chrome extension from https://www.intouchapp.com/extension
Step 2 - Sign in with the same phone number you used on your phone
You are now ready to use InTouchApp Extension on your Chrome browser!