Are you planning on opensourcing this at all (github?)
I would like to. But, not all the business decisions have been made yet, and I will keep the IP under wraps until the future direction of the software is decided.
are you planning to sell this for a nominal fee on the Play Store at a later date?
Probably not, but all cards are on the table.
I'm still a bit paranoid when it comes to closed source cryptocurrency "wallets" (yes, I know it's not really a wallet, but still)
This is well understood. The feedback I've gotten is that most people are very worried about using any crypto related app in fear of security and privacy issues. I've put a full FAQ on this blog post to explain security and privacy issues. In a nutshell, there's nothing my app could do to steal any of your crypto, and it doesn't do anything that would compromise your privacy.
https://christianfindlay.wordpress.com/2018/04/22/hardfolio-alpha-testing/