I implemented collapsible comment chains in v0.2.1 which should be out within the next day or two. I added settings as well to choose between (tap|swipe|both|disabled) for the feature. I’ve been testing it for a few days and it seems to be working great.
I’m also working on a feature to automatically collapse low score chains when opening a post, though that needs some work and likely won’t be included in this next release.