What are some alternatives?
When comparing YouiDraw and Adobe Illustrator CC, you can also consider the following products
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
CorelDRAW Graphics Suite - Empower your creativity with CorelDRAW Graphics Suite 2018, packed with powerful features and updates to transform creative ideas into visually stunning designs! Learn more or download a free trial today!
Sketch - Professional digital design for Mac.
Boxy SVG - Boxy SVG is a vector graphic editor built for the modern web.
Affinity Designer - Professional creative software, exclusively for Mac.
AutoDraw - A Google Experiment that helps you draw with relevant suggestions.