So the App works-wish list
- You want to save an App, first click on the Export Button next to the Heading.
- Here you will find below the Social Media features, the Option to "Add to Wishlist".
- With this you have added the App successfully on your personal wish list.
- The Apps you will find under the list icon in the top menu of the App Stores, in addition to "All Categories", "Games" and "More".

App Wish List
Note: Apple offers this feature only for paid Apps. What are the hidden Features iOS 7 else offers, read here.
