It was White Flat, an incredible theme that I did years ago and that comes to Android today. This is a third aspect of the Era theme and it is for those who like this kind of icons. Now what you get when you buy Era White Flat:
+ More than 1880+ Beautiful icons and more will be added in future updates
+ 1 Kustom Live Wallpapers (you need the pro version of klwp)
+ 2 springs
+ 10 wallpapers
+ Cloud wallpaper picker
+ 22 folders
+ Dynamic calendar support even for Google Calendar and Business Cal
+ more to add in future updates

Supported Android
(4.1 and up)
Jelly Bean (4.1 – 4.3.1),KitKat (4.4 – 4.4.4),Lollipop (5.0 – 5.1.1),Marshmallow (6.0 – 6.0.1),Nougat (7.0 – 7.1.1),Oreo (8.0-8.1), Pie(9.0)