Send notifications when games on the wishlist go on sale
The wishlist feature right now is not much more than a list of bookmarks. Why not send users push notifications when games on the list go on sale? And/or send them an email when it happens?
It would be a much better user experience than having to open the app daily to see if you didn't miss a sale. Most days, there is no sale, so the process gets tiring - and then you probably miss the sale when it DOES happen.