Really depends on your objectives. Cost per click is normally used if you want to drive direct action, like a sale or a install. Great for doing things like installing games.
Cost per view is more appropriate if you want to build a brand. It’s more appropriate for things like angry birds, they don’t care which game you install, just that you get an angry birds game, or an angry birds toy, or a t shirt or…
By the sounds of it you need the installs, not the branding.