Exacto – Photo Cut
Exacto is an app that helps you remove backgrounds from your photos. Using the pen tool, you tap blue points on the screen, which map out the outline. Any point’s location can be adjusted by selecting it and then dragging it. The black dots allow you to adjust the curve of the cutout as well. It works as advertised, and is a good option for quick edits on iOS.
You can download it on the App Store for $2.99