Adobe's Photoshop software still rules the image-editing kingdom. But is it worth $20 per month? (That's how much it costs to license the software on a computer.) If not, the Pixelmator app ($5) may be all you need. It's full-featured, with tools for watercolors, color correction, clones, blurs, sharpening, adding text, blending layers, and tons more — and the Apple Pencil helps you fine-tune it all. You can open, edit and save Photoshop files with Pixelmator, and unlike some other image-editing tools for iOS, you can create blank canvases with custom sizes. A Mac companion app is available for $30, as well.