Their mobile app (on iOS) is pretty terrible in my opinion. I use Apollo. It's fairly priced and the developer is responsive, and it feels like an iOS app not a web app.
Maybe if it actually worked for me. I often end up receiving the 'use the mobile app' prompt on Firefox for Android, or the Reddit logo splash screen.
For a mobile friendly UI I prefer the open source app RedReader (which has a nice dual column view for wider screens). Otherwise for casual link clicking I'll just use old.reddit.com, it's snappier to load as well in my experience.
