from google trends, Unity is 7-10 times more popular than unreal engine 4.
I use both Unity and unreal engine 4, I love unreal engine 4, and use it since two years before, only for personal use,
It seems like epic is too slow, two years after, the mobile support is still terrible, the apk and ipa size is still terrible huge,
nothing changed, I think epic never care about mobile developer.
but look at Unity, it’s more and more better, It change a lot in the past several years.