When comparing Affinity Photo vs ForkLift 3, the Slant community recommends ForkLift 3 for most people. In the question“What are the best Mac OSX apps for someone that's new to Apple?” ForkLift 3 is ranked 11th while Affinity Photo is ranked 17th.
Ranked in these QuestionsQuestion Ranking
Pro Lifetime updates
Pay once, get updates forever.
Pro Interface will be familiar to those coming from Photoshop
The interface, especially the Photo persona, is laid out in way that's very similar to Photoshop - a panel for icons for tools on the left, a panel for information and settings on the right.
Pro Non-destructive adjustment layers
extensive adjustment layers are non-destructive.
Pro Compatible with Photoshop PSD files
Affinity Photo can import and export .psd files.
Pro Supports layer styles
Layer styles allow non-destructively applying effects to a layer.
Pro Personas allow separation of concerns
At a high level the interface is organized into broad groups of tools called Personas. Personas like Photo for in-depth image manipulation, Liquify for warping the image, Develop for basic RAW photo development and Export for exporting. Each persona displays only those tools that are needed for that task.
Pro Great performance
Uses the GPU extensively for fast speed on any platform.
Pro Powerful effects
Dozens of visual effects available. All run extremely fast with live previews
Pro Runs faster than Photoshop's old code
Pro Easily toggle hidden files
Pro Connect to and mount lots of storage options
FTP, WebDAV, Amazon S3, Backblaze B2, Google Drive, Rackspace CloudFiles, SMB, AFP, NFS, VNC, etc.
Pro Optional dark UI
In addition to the default Mac gray UI, Forklift 3 offers an alternate "Dark Mode" featuring light text elements against dark backgrounds.
Pro Built-in application remover
Pro Rewritten in Swift
Forklift 3 is a significant update from FL2, having been rewritten entirely in Swift.
Con Limited selection of plugins
Plugin support was only recently added to AP and not many plugins have been created for the program so far.
Con Can not import gimp or krita files
Free alternatives like gimp (and krita) are sort of "go to" apps i can allways install and use for simple image editing or graphics on any computer. I find affinitys support for photoshop is great, but having support also for opening and editing gimp and krita would make the versatility and use of this program absolutely superb.