The app will work with your smartphone, and will provide an vibrating alert when an Instagram notification comes through to the SmartWatch 2, you can find out more details about the app below.
With this app, you can view Instagram notifications and read your Instagram friends’ comments in your Sony SmartWatch 2. When new Instagram activities come in, a vibrating alert will let you know. Leave your phone in your pocket or bag. View everything on your wrist.
Use Sony’s Smart Connect app to manage Smart extension for Instagram.
When you have installed this app, it will not appear on your home screen. Instead, it will be integrated into Smart Connect.
The Instagram extension app for the Sony SmartWatch 2 is available as a free download from the Google play store.
Source Xperia Blog