Easy color palette from a photo.
I use Adobe's Ideas app for quick notes and ideas but also for some sketching. I'm not that great of a sketcher, so Ideas' vector canvas makes me look a lot better. In truth, I really use it a lot more for color inspiration. I like how it can create color palettes from photos on your phone (or iOS device). If you're looking for an easy way to extract a color swatch for a project, use Ideas - it's free!