I know it's just a beginning but I am already in love with the Ecency Web interface! Everything works so fast! Looks like it never ever worked that fast on eSteem mobile and Surfer. And IMO Ecency is much faster than other interfaces for Hive. I'm sure all the necessary features are coming soon. I'm sticking to Ecency Web for now but would love to use mobile app if it will be even faster.
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.
Yes, I'm writing these comments from mobile version of Ecency web and it's really fast here. The only bug I've noticed when I am writing big comments and type fast sometimes it stuck (I can not press anything and my phone is not responding but after some time it is getting back to normal. I don't know if it is related to SwiftKey keyboard with swipe gestures or maybe it is connected with Preview feature here. Now I'm trying and everything is working fine. Last comment had that bug. Will try to test it out and see if I can reproduce it again.