This app was mentioned in 13 comments, with an average of 2.23 upvotes
Can't be 100% certain, but it could be Nova Launcher. Even if its not, you could certainly make Nova look like it.
Don't know about the icon pack, though it looks similar to Audax
Audax is the greatest icon set of all time.
Audax - looks nice and sharp on QHD displays
https://play.google.com/store/apps/details?id=kov.theme.audax
No one's mentioned these yet? O_O
Both of these are round icons with subtle shadows.
Audax - Icon Pack (this has been my main icon theme for years now)
Bold- Icon Pack (similar style but more detailed. i use it as substitute for some icons.)
Before these two, I've used DCikonZ but it looks slightly dated by now.
Audax, paid. The only icon pack I've ever used, and probably will ever use. It's perfect.