What are some alternatives?
When comparing DrawPad and Adobe Photoshop, you can also consider the following products
CorelDRAW - CorelDraw is a world’s most leading Graphic Design Software solution created by Corel Corporations.
GIMP - GIMP is a multiplatform photo manipulation tool.
Adobe Illustrator - Adobe Illustrator is a vector graphics editor.
Pixelmator - Pixelmator is an image-editing application for Mac and iPad.
Sketch - Professional digital design for Mac.
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.