Getting an App noticed is pretty difficult if you're just relying on the App Store. Perhaps this will help some of the smaller developers.

Now if you’re on your iPhone or iPad, you’ll see another kind of Pin: app Pins. Let’s say you’re Pinning workout inspiration to your Marathon Training board. If you see a fitness app that helps you reach your goals, you can download it right from Pinterest.

When you come across an app Pin, tap Install to download the app right to your iPhone or iPad without ever leaving Pinterest (you’ll only see app Pins when you’re using the Pinterest app on your iPhone or iPad). Pinterest and Apple Team Up For "App Pins" For Easier App Discovery [blog.pinterest.com]