Try https://ecency.com on mobile browser, it should be quite decent speed as well. At least in tests we noticed it was performing quite fast on mobile devices. As for Mobile app, we have overcrowded it with features, that's why we will need to spend couple updates just for improving performance. I noticed, it did degrade a bit on slower networks, we will need to find better caching mechanism and auto detect/switch to fastest server without user interaction.
RE: Announcing Ecency Vision