Show HN: Toned, an iPhone darkroom app that models film negatives and paper

#1

Post by duman » Wed, Aug 26, 2026, 12:11 PM UTC

I am interested in simulating pyshical processes in software so i decided to build an iPhone app that simulates film negatives and paper.

It models in 2 stages: scene light -> color negative -> print reflectance

The negative uses per-dye-layer H&D curves and the paper also has its own response curves.

If you've ever spent time in a real darkroom, I would really like you to try the app and share your opinions.

App Store: https://apps.apple.com/app/id6799706160

Re: Show HN: Toned, an iPhone darkroom app that models film negatives and paper

#2

Post by rachelb1331 » Wed, Aug 26, 2026, 6:34 PM UTC

I'll definitely give this a try. I double majored in photography and American photography history in college (I know, super useful... now I work in tech). I had my own darkroom. What I loved to do (and would love the ability to do digitally) as to blow out the whites and make the B/W contrast a max while combining multiple negatives at once. Sort of like a collage, layering the negatives on top of each other. Can you do that in the app? Also - I'm sure - is it easy enough to convert any color image to B/W and adjust the levels?

Re: Show HN: Toned, an iPhone darkroom app that models film negatives and paper

#3

Post by duman » Thu, Aug 27, 2026, 10:35 AM UTC

rachelb1331 wrote: post #2

I'll definitely give this a try. I double majored in photography and American photography history in college (I know, super useful... now I work in tech). I had my own darkroom. What I loved to do (and would love the ability to do digitally) as to blow out the whites and make the B/W contrast a max while combining multiple negatives at once. Sort of like a collage, layering the negatives on top of each other. Can you…

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