I've been looking for an app like Shapes for the longest time. All I want is an app that I can use to draw simple diagrams or overlay arrows, shapes and text on an image. I have been using another app for this purpose, but always found it kinda kludgy, and a recent update has only made it worse. Along comes Shapes, I tried out the free version (available on the dev's website), and I bought it within 5 minutes. I love that it uses layers and layer groups (like Photoshop), and that I can save projects with all layers intact for editing at a later time. What a great app!