http://slackinvite.supernet.org needs an invite, please send it to me in order to join.
Also you should try all you can to make the voting process of selecting the winners very transparent, if need be use random.org.
You just need to put your email in the form at that page and it should automatically send you an invite link to your email address.
The voting process will be conducted over the #nxthacks slack channel on SuperNet, so everyone will have input to arrive at a clear winner.
I will join the channel now though I don't know how to create any app I am a suck when it comes to that.