Swish (formerly Wishlist King)

Probably the best wishlist app there is when it comes to a professional looking store, I've tried them all and this has the smoothest animations, similar to what you'd get in a high end store.

Toby from the support team was incredibly helpful in getting the app set up for me and his attention to detail in getting the icons and style to look like my existing brand is unmatched. Highly recommend!