What are the factors needs to check to get better performance in android and ios devices. How to improve the performance in those kind of devices. What kind of settings needs to be done for Engine or renderer. ?
I think it’s more or less the same optimizations than on a desktop. You will find a lot of threads about optimizing for speed in this forum.
Maybe for mobile dev you should also try to minimize the texture weight on GPU side using compressed textures. And transparency is sometimes a performance killer on some mobiles (from some threads I could see).
People knowing mobile dev better than me may add some other advices.