AppCoins Protocol: Proof-of-Attention in Android

TLDR: A big challenge we aim to solve with AppCoins and the App Economy is to allow users to earn coins by paying attention to apps for a certain amount of time. This is also referred to as Proof-of-Attention (PoA). A big part of creating such a proof involves the smartphone environment and considering the majority of smartphones in the market run Android we have decided to focus in this platform.