Here is my take on Appcoin:
It allow Android app developers to put their apps/games in an independent app-store - circumventing the Google Play Store and all it's many shades of bureaucracy and introduce a blockchain/coin within that platform.
In the context of in-game app purchases, advertising and ratings - this token can enable the ecosystem to become more attractive for both users and developers.
They already have a large platform, 200 million users, that will be able to buy this token and use it. I can see 6.00$ happening for the short-term and I'm usually conservative in my predictions. But if anyone could tell me the market cap, that would be great

Whitepaper:
https://appcoins.io/pdf/appcoins_white_paper.pdf