Ugly compresion?

What is this? Is it bad compresion or bad filtering. I dont know how I change it. Is it normal?
I compiled my project on Ipnone 5c (UE v.4.8.3)and saw those pesky the textures . How can I improve it so that it was like on Android.
On android is better (normal) and take less space .

By default apple devices render in 1/2 or 1/4th of screen resolution to speed all up, save power etc. You need to change your project ini filies. There are topics on this and some articles, use googles.

Also this may be result of texture compression you used.