Hey everyone - I'm the founder of Fluxon. Just saw that we were on HN today - sorry for the late replies.
The app you're using right now is essentially an alpha-version - even the website was only made this week. Sorry about the somewhat-broken experience so far.
I'll try to get back to everything here in the next couple hours but if I miss something / you have other questions, please ping me on akshay@fluxon.ai