Retricon: based on Retron-UI, it contains the flat icons of this package. You need a third party launcher to apply the icon pack !!!
* 3,000 + HD icons (192×192)
* Matching HD cloud backgrounds
* Launcher support: Action, Adw, AdwEX, Apex, Atom, Aviate, GO, Next, Nova, Smart, Solo …
* Icon masking for icons without theme
* Dynamic calendar
* Alternative icons to choose from
Supported Android Devices : [5.0–5.0.2] Lollipop – [6.0 – 6.0.1] Marshmallow – [7.0 – 7.1.1] Nougat – [8.0-8.1] Oreo –  Pie