How to run angular 7 app on android and ios?

I'm creating an application on Angular 7. What should i do to make it work on mobiles properly?

It works fine on desktop in aot mode, but on android it loads really slow (about 20 seconds), and on IOS it just doesn't work - neither on desktop nor on mobile (macbook and iphone X, browsers Safari and Google Chrome last versions).

What should i do to resolve this?