is a photo editing app with a wide variety of professional editing tools. This app allows you to work with an image in layers, adding various special effects and filters, similar to Photoshop. It's very intuitive to use and works similarly to other photo editing tools.
This app is free, but to download it you'll need to register for an account using an e-mail. For those who want even more advanced features, Luminar 4 is also available here