Adobe Illustrator is described as 'Vector graphics editor with advanced color controls and creative effects for comprehensive design tools across print, web, and mobile content' and is a leading Vector Graphic app in the photos & graphics category. There are more than 50 alternatives to Adobe Illustrator for a variety of platforms, including Mac, Windows, Web-based, Linux and iPad apps. The best Adobe Illustrator alternative is Inkscape, which is both free and Open Source. Other great apps like Adobe Illustrator are Linearity Curve, Figma, CorelDRAW Graphics Suite and Affinity.
More of a flowchart designer than a vector illustrator