I have IOS 10 and I cant use the stickers from the app as stickers in imessage. I can only send them as pictures, which is disappointing, especially since in one of the pictures, you advertise the app as using the stickers as actual imessage stickers, not just photos. Its a definite mislead from that photo alone.
The rest of the app is cool and I like collecting things, but the misleading thing is the reason why I gave this 4 out of 5 stars.
*************EDIT***********
I gave this app a lower rating because as I try to add Pops to my showcase, the app closes. Please fix this
************EDIT V2**************
I have now been able to use the stickers in imessage after installing iOS 11, but I sometimes still experience crashing after adding too many Pops! to my showcase.