StochasticGrain vs RawMask Studio

Unlike simple noise overlays, this app uses a physics-based approach where grain density responds to image brightness, just like analog film. Shadows show more grain, highlights stay cleaner. The result feels organic rather than digital. Built on academic research by Newson, Delon, and Galerne (2017) modeling stochastic film grain through Boolean models, with real-time optimizations informed by Zhang et al.'s 2023 SIGGRAPH work. These papers describe how actual silver halide crystals distribute in photographic emulsion. Exposure-dependent grain that responds to image luminance Real-time preview as you adjust Designed for film photography enthusiasts A passion project for anyone who appreciates the texture of analog photography.

Edit only the part of the photo you choose. RawMask Studio is a RAW photo editor built around masks: pick a detected subject or draw your own mask, then change the light, color, detail and focus of just that area while the rest of the image stays untouched. It opens RAW and ProRAW files as well as everyday JPEG and HEIC photos, and every edit happens right on your iPhone. MASKS FOR SELECTIVE EDITS - Automatic masks: on-device detection finds subjects such as people, cars and animals and turns them into ready-to-edit masks - Manual masks: radial, linear (gradient), brush and rectangle - Refine any mask with the Add and Subtract brushes - Soften the edge with Feather for smooth, natural transitions - Give every mask its own light, color, detail and focus adjustments RAW, PRORAW, JPEG AND HEIC - Pick photos straight from your Photos library with the system picker - Edit RAW and ProRAW captures with the same tools as regular photos A CLEAR, STEP-BY-STEP WORKFLOW - Frame: crop, straighten, rotate, aspect ratios and zoom - Light: exposure, contrast, highlights, shadows, whites and blacks - Color: temperature, tint, vibrance and saturation - Detail: texture, clarity, dehaze, sharpness and noise reduction - Focus: background blur with strength, range, feather and bokeh - Effects: vignette, grain and fade - Reorder or hide steps in Editor options to match the way you work COMPARE AND REUSE - Hold to Compare to check before and after at any moment - Save whole-photo adjustments as a Preset and apply it to another photo SAVE WITHOUT LOSING THE ORIGINAL - Save edit to Photos is non-destructive: the original stays intact and you can revert the edit in Photos anytime - Save a copy to Photos to keep the edited version as a new photo - Export as JPEG, HEIF or TIFF through the share sheet PRIVATE BY DESIGN - No account, no sign-in and no ads - Editing and subject detection run entirely on device, so your photos are never uploaded - Free, with no in-app purchases Open a photo, pick a mask and make one part of it shine.