How to add film grain to iPhone photos, and make it look like film

26 October 2026 · By Abu Ashraf Masnun

Grain is the salt of a film photo. The right amount and nobody notices it; too much and it's all anyone can taste; the wrong kind and the whole dish tastes of the packet. On an iPhone, most grain comes from a slider that sprinkles the same grey speckle over everything. This page is about the other kind: grain with a size, a place in the tones and a film it belongs to.

To add film grain to an iPhone photo that looks like film, use grain with a size as well as an amount, strongest in the midtones, added last and at full resolution. In Chobial, grain is part of each film: you see it live in the viewfinder, it follows the ISO you shoot at, and you can turn it up or down on any photo afterwards.

What makes grain look like film grain

On film, grain is the picture itself. It's made of tiny bits of developed silver, or the dye clouds left where silver was, and bigger crystals make a faster film with more visible grain. That one fact explains most of the look:

• Size, not just amount. A slow ISO 100 film has small, tight grain; a fast ISO 1600 film has big, clumpy grain. A slider that only says "more" skips half of it.
• Where it sits in the tones. Grain shows most in the midtones and fades in deep black and clean white. Our own measurements put the peak around 44% grey, which is in why digital grain looks fake.
• Colour on colour film. A colour negative has three emulsion layers, each with its own grain, so the specks are faintly coloured. Grey noise over a colour photo reads as a screen in front of it.
• Format. The same film looks grainier on a small frame, because it's enlarged more. 16 mm cine film is gritty, 35 mm is the classic, and large formats look almost clean.
• Order. Grain comes last. Sharpen it and it goes crunchy; shrink it and it vanishes.

Film grain by film speed and format

Chobial's film editor has a Grain Stock menu with four starting points, one per format and speed. Each sets three sliders, and you can move any of them afterwards:

Shadow Bias moves the grain towards the darker tones, the way a fast film underexposed a touch gets grittier in the shadows. Leave it low for a clean, well-exposed roll.

How to add grain in Chobial

1. Load a film with the grain you like. Every built-in film carries its own grain. Press has gritty press-photo grain, Night heavy grain, Dusk coarse pushed grain and Vintage heavy grain with soft detail. For fine grain, try Vivid or Lifelike; Mono has none at all. Swipe across the picture to change film, or tap the badge beside the island.
2. Watch it live. The grain is in the viewfinder as you frame, not added later as a surprise.
3. Let the ISO do some of the work. Every film has a box speed: Gold is rated at 200, Portrait and B&W at 400, and the rest by how much grain they carry, as film is. Shoot faster than that and the grain grows for each stop, like a pushed roll, up to three stops. Below it, the film keeps its own grain.
4. Change it on one photo. In the Library, open the photo, tap Edit, choose the Film tool and slide Grain. It starts at the film's own amount, so you're adjusting, not starting over.
5. Build your own grain. In Films, tap + › New Film, open Effects, and pick a Grain Stock to start from. Then slide Grain, Size (0.5 to 3) and Shadow Bias. Tap the number above the ruler to type an exact value, or double-tap the ruler to reset it. The details are in make your own film.

Under the hood, Chobial's grain is soft, clumped noise with a coarser second layer, strongest in the midtones and fading to nothing in pure black and white. On colour films a little of it is in colour; on black and white it's neutral. Its size is set for a 12 megapixel photo and scaled with the output, so what you see on the screen is what lands in the file.

Grain on RAW vs grain on HEIF

A HEIF from the iPhone has already been through noise reduction and sharpening, which smears fine detail into the painterly look people complain about. Lay grain over that and you get grain on top of watercolour. A RAW keeps the sensor's own texture, so a film's grain has something honest to sit in. Chobial's films work on all four formats (ProRAW, RAW, HEIF and JPEG), but grain looks most like film on RAW. The trade-offs are in iPhone RAW vs HEIF for a film look, and the painterly problem in why iPhone photos look like paintings.

Plain RAW in the dark can be noisy all by itself. If the sensor noise is fighting the film grain, a film's Develop section has its own noise reduction, so you can clean the sensor up a little and let the grain do the talking.

How much grain is right?

Less than you think, then a bit less again. Three rules of thumb:

• Match the grain to the light. Bright daylight and a slow-film look want fine grain. Night, flash and grubby interiors can take a lot more, because that's when film photographers loaded fast film.
• Size up for small screens. A photo shown 1080 pixels wide on Instagram loses most of its fine grain to the shrink. Raise Size a little rather than Grain, so it survives without turning into gravel at full size.
• Check at 100%. Pinch in on the photo in the Library. If the grain is the first thing you notice, it's seasoning the plate, not the food.

Grain has a sibling that makes film look like film just as much: the red glow round bright lights. That's halation, and it lives in the same Effects section. And if grain is the whole point, black and white is where it shines: see Tri-X and HP5 black and white on iPhone.

Apple, iPhone and ProRAW are trademarks of Apple Inc. Kodak and Fujifilm, and the names of their films, are trademarks of their owners. Chobial is not affiliated with Apple, Kodak or Fujifilm.

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