# App Block Setup

- [What are app blocks?](/skio/app-block-setup/what-are-app-blocks.md): App blocks let you add app functionality exactly where you want to use it in your theme. You can add, remove, preview, reposition, and customize app blocks through the theme editor.
- [Plan Picker](/skio/app-block-setup/plan-picker.md): How to add the Skio Plan Picker to your product pages using App Blocks