Some of the apps offer photo adjustments, others (like Moku Hanga and all the Jixipix apps) transform photos entirely. Note that for me, since these are not images I usually care tremendously about, I use all sorts of free and cheap apps and extensions, of varying quality, and I just play. I use outside apps and extensions to work on copies of the original image, which then gets saved back into Photos alongside the untouched original. I use Photos app exclusively for my non-serious iPhone images, so I’m not precious with them. (And those aren’t the only apps I’ll use.) Likewise, on the Mac I’ll use the stock Photos app with a number of image editor extensions - and even apps that aren’t plug-ins via Alex Kent’s excellent free Open In extension - for editing my iPhone pics, and I’ll use Lightroom/Photoshop for managing and editing my DSLR photos. It doesn’t do photo adjustments, perspective editing, b&w options or image framing as well as the iOS apps I mentioned above. I’d never let myself be restricted to Pixelmator for photo adjustments. And I similarly use multiple Mac apps as well.

Only two of the iOS apps I use, Photoshop/Lightroom and Pixelmator Pro, have macOS analogues. I periodically use several iOS apps alone - including Darkroom, SKRWT, Camera+ and VOUN - for their different (often specialized) editing/sharing abilities (some quick and dirty, some not). I’d suggest reconsidering that because there’s no reason to use one standard app. I am trying to decide on one standard photo editing program for both Mac OS and iOS.

Nik collection affinity