While this is free to play "gems" are required to pick the good responses as well as outfits and the only way to get said gems by the looks of things is by watching ads, by purchasing them or by what seems to be achievements,
if this is the case i would put on this page that in app purchases are in the game or alternative ways for the gems,
i understand that you need to make money its just that i feel like the hour count down on the ads for diamonds is excessive and that there should be more ways to get the gems.