GraspIO Studio is a block-based mobile IDE that uses a Drag and Drop interface to create projects that run on GraspIO Cloudio.
This Android and iOS app contains a range of blocks (Input, Output, Control, Notifier, and Advanced) that you can use to create IoT projects in minutes. With a single tap upload, your projects can be deployed over your local network or over the GraspIO IoT Cloud.

Watch this video to learn more:

Download the app, add your Cloudio board, and you're good to go!

Here's some suggested reading.
Getting started
Adding your board
Creating your first project
Understanding the different blocks
Example projects