The interface of Ribbet is fantastic. It looks great, and it's very easy to navigate. There are several effects and filters available for free. It's great that it is accessible through both mobile app or desktop, both which have nice interface, as well.

This might be my favorite photo editing app. It has everything you could possibly need for editing photos. It even has features that would normally only be included in “beauty” apps or makeup apps. The interface is fantastic. Very smooth, and very easy and enjoyable to navigate.

I liked that it was fairly easy and simple to use. Everything was pretty intuitive as long as you are not a complete newbie to photo editing and or technology.