I'll look in to open sourcing... Maybe if I receive enough donations.
How about I set a some donation goals. I can only think of two, considering I have AdMob ads in place.
1. If I get a total of 10 btc I'll remove the ads.
2. At 20 btc I'll opensource it.
With all respect to the work you have done so far:
Open sourcing IS a prerequisite to gain trust in a community like this (and most other communities also). I do understand that you would like to receive something back for what you do, so keep the ads there if you wish. In another scenario, if you do indeed show that your produce is good enough and secure enough (by exposing the code), you can certainly ask for donations to provide user-suggested upgrades and customizations.
But no open source is a no-go, at least for me. I've been on the Internet since 1995, and I have NEVER got a virus, because I decided that I'll be careful from the beginning. And since bitcoins are money nowadays, I would never download something which does not expose its source code to the community.
With that said, we all should be free to do as we wish, so good luck with your project.