There are more than 200 different templates divided into 20 categories. You can find anything from Halloween, minimalism, graffiti and each theme includes dozens of templates.
Customizing a template with StoryArt is a simple as clicking a couple of times and substituting the default pictures in the template for your own pictures. You can also add filters and text to the image to give them a very unique touch.
StoryArt is a really easy-to-use picture editing app that offers great results. Something that's worth mentioning is that although it's geared towards Instagram stories, you can actually use it for other editing purposes.