Features:
• 3000+ high quality Icons inspired by Flat and Material Design.
• Frequent Updates.
• Exclusive Wallpapers.
• Alternative Icons.
• Dynamic Calendar support.
• Icon Request Tool.
• Icon Search.

On some launchers you need to enter the launcher settings to activate the icon pack. :)

If you are using OnePlus launcher just enter the launcher settings: hold your finger on the home screen, then click "Icons" and select the Flat Pie.

Supports
• Nova Launcher
• Apex Launcher
• One Plus Lau