I thought I’d give the trial a go, but found that there seemed to be quite a bit missing. Masks are limited with no means to manually tweak some of the erroneous foreground/background edges as there’s no way to paint missing parts of a mask or push/smudge parts of a portrait or depth mask that is incorrect. Also there’s no way to invert a radial mask. The website claims to be able to blur background in a portrait photo, but I was unable to find any blur function no matter how hard I tried on both iPhone and iPad. There’s some nice ui elements, but it feels like ‘half’ an app. There’s no effect like bokeh that you can mask in etc. even the presets aren’t affected by masks.I can’t justify the cost. I’d pay about ¼ the price as I could only see myself using it casually. Snapseed does so much more and has a hidden mask mode which you can apply on every single image adjusting function, filter, and effect, so that you can blend or paint that adjustment in. All those masks are adjustable from a history of operations you’ve made. Snapseed is free, so I would expect Darkroom to offer more flexibility. Darkroom does offer video processing, but for those working with photos, it seems to add to the price substantially.