Affinity Photo is a raster graphics editor developed by Serif Ltd. It is available for iOS, macOS, and Windows, with a focus on photography professionals. Here's an overview of Affinity Photo:

Key Features:

• Non-destructive editing with live preview and pan and zoom at 60fps.

• Unlimited layers and layer adjustments.

• RAW photo processing, editing, and development.

• Color space options: RGB, CMYK, LAB, Greyscale with ICC color management, and 16-bit per channel editing.

• Breathtaking compositions with effects, masks, adjustments, and blending modes.

• Image stitching and alpha compositing.

• Black point compensation and optical aberration corrections.

• Support for common file formats, including Adobe's PSD and Photoshop Smart Objects.

• Built-in tools for retouching and object removal like Dodge, Burn, Clone, Patch, and Blemish Removal.

• Customizable brushes with the ability to create your own and import .abr brush files.

• Compatible with iPad