There's of course the competition here between mobile site users and desktop ones. But I think another important distinction is between mobile app and mobile website development. A lot of the statistics that get thrown around about mobile gamers nowadays relies on app download numbers to prove their viability. Whereas on a site-based pet sim there's less of a continuous external tracker. So I'm not too sure if the intended audience between a pet sim website is the same as one driven for a pet sim app. Of course there's probably a ton of overlap regardless.