Features:
• 3100+ high quality Dark Icons inspired by Flat and Material Design.
• Exclusive Wallpapers.
• Frequent Updates.
• 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".

Supports
• Nova Launcher
• OnePlus Launcher
• Apex Launcher
• Go Launcher
• ADW2
• Action Launcher
• ABC Launcher
• Aviate Launcher
• Evie Launcher
• Holo Launcher
• ICS Holo Launcher
• Lucid Launcher
• M launcher
• Zero launcher
• V Launcher
• Smart Launcher
• Mix Launcher
• Cool Pixel Launcher
• Lawnchair Launcher
• Hyperion Launcher
• Super P Launcher
• Rootles Launcher
• Solo Launcher and many more...

How to Apply Icons with Flat Dark Square Icon Pack
1- Open Flat Dark Square Icon Pack
2- Navigate to Apply Flat Dark Square
3- Select Your Launcher
4- Enjoy Your New Theme :)

Stay in touch:
https://twitter.com/FLDesign5
https://www.instagram.com/fl_icon_design/