I don't have a github account but I wanted to give you this feedback. I can't really comment posts here on Zapread while I'm on my phone. Sometimes the box to "Write a comment..." Can't be chosen or in other cases where it was possible (which feels random so far) I can press the submit button but it doesn't react but it still gives the yellow outline as visual feedback.
I don't know if its just because my phone and OS is old, outdated and not updated or if other mobile users also experience this problem ... I mean they can't comment this post so they would have to make a new one themselves.
Anyways I really like the Idea of Zapread and would like to use it more in the future and hope more users will join!