Knives Out Director Launches a $13 iPhone Camera App Built on His Film Grade
Rian Johnson and cinematographer Steve Yedlin have released Chromagraph Camera, a $13 iOS app that applies the look used on Johnson's movies to still photos taken on an iPhone. The Verge reported the app's price and its origin in Johnson's own grading work.
The app bypasses parts of Apple's image processing pipeline, the chain of steps that turns raw sensor data into a finished photo. It does not adjust the default camera's output after the fact. Eric Cameron partnered with Johnson and Yedlin on the project, according to NewsShooter. Johnson said he asked Yedlin to build his ideal iPhone still camera app, as he posted on X. Johnson directed Knives Out and The Last Jedi.
Johnson has said he wanted phone photos to look more like the grade he applies to his films. Grading is the final color pass that sets a film's overall look. He carries a phone at all times, he said, where he would otherwise need to carry camera gear. Before moving to third-party RAW apps, which save the sensor's unprocessed data for editing later, he shot with the iPhone's default camera and edited in Snapseed.
The app includes controls for maximum exposure time (how long the shutter stays open), burst mode, and color tuning. It can also import RAW images shot elsewhere and process them inside the app. 9to5Mac reported that the app has no in-app purchases.
The color work behind the app predates it. Yedlin developed grading scripts to give Johnson's films the organic look of celluloid, meaning traditional film stock. Those scripts were later used to process still RAW files and film scans, which is the foundation the app builds on.
In my view, the notable part of this release is the direction of the workflow. A grade designed for a feature-film pipeline is now a capture-time tool for a device most people already own. The phone's default rendering has long been the starting point for casual photographers, and this app replaces that starting point with a specific aesthetic chosen by two filmmakers.
The broader context here is that the open questions are practical ones. Consistency across scene types, low light, and mixed lighting will determine whether a fixed film look holds up outside the controlled conditions of a film set. Those are questions for users to test.
What the app makes possible is a shorter path from a professional's taste to a pocket device. A director who always carries a phone can shoot with the grade he has spent years refining, without a second camera. For technology professionals, the interesting element is that the grade is a software artifact that can be applied to RAW captures and film scans alike, and that Yedlin's scripts have moved from a post-production suite into an app running on an iPhone.
