Android also has a native markup tool — in the Photos app, select the photo, tap on the Edit tool (second from the left on the bottom) and choose Markup (second from the right on the bottom). You can then use the center-bottom Pen tool to scribble over anything you want to cover. Hiding faces using the iOS Photo app.
What Sells Best On Shutterstock?
Some types of photos that sell best are Portrait Photography, Food Photography, Landscapes (usually with people) and fine art photography (artsy).