From what I çan understand and interpret from the Appcoins meetup in Singapore, the 'Proof-of-Attention' (unofficial term) is based on the ecosystem when the users download a certain app and uses it, they are paid in tokens depending on the level of usage/online. So the more they use a certain app, the more token they can gain. This will also in term feedback to the developers on usage patterns of their respective user. This whole process is term 'Proof-of-Attention', and you can see it as the user 'mining'+playing the game at the same time.

One key thing to take note is that the token issued to the user is locked (in another words, they can transferred or use it) until they spent a certain amount.


Definitely it can be applied in a wide range of area. Appcoins is built as an protocol so any company or system can apply appcoins protocol to be part of their ecosystem.