Thats very strange, i'm fairly certain there should be a button for it. At least in more up to date builds. At the moment updates to The Couch are a ways off until i can rebuild some features since we lost our programmer (They got scammed for $8k and needed to find a normal job). I'll look into this once it's feasible for me to do those updates.
Sorry your programmer is having a tough time. Obviously that is more important.
I did look at the html 5 version on desktop, and that made it clear that the issue on Android is just one of screen proportions. On my phone it turns out that the top and bottom of the app's screen are cut off because my phone is too 'widescreen', so the button in question is there, just offscreen. That should be easy enough to fix whenever work resumes. Until then I'll figure out how to subscribe/watch for updates. Cheers!