Process Zero is even better with a little processing on the side

"Here's how it goes: I shoot RAW in addition to the default HEIC output, and since I have the RAW file I might as well edit it to my taste. And if I'm going to do that, I want to use Lightroom on my MacBook. You know, real software. Then I remember: iPhone photos hate real software. Moving image files between devices is mysterious."

"This has its pros and cons. On the plus side, it's way easier to deal with iPhone photos if they never leave the native camera app. But it also means leaving processing up to the iPhone, which tends to run amok with sharpening and raising shadows. I lean on the app's built-in Photographic Styles (shout out to Rich Contrast, you're a real one) to avoid this, but lots of people look to third party options like Halide's Process Zero."

Moving RAW files from iPhone to external editors can be unpredictable because the phone’s pipeline stores processing metadata like HDR gain maps. Native iPhone processing often applies aggressive sharpening and raises shadows, causing edits in apps like Lightroom to look different than intended. Many users either accept iPhone-produced images or rely on built-in Photographic Styles to manage tone. Third-party camera apps offer alternatives. Halide's Process Zero mode strips much of the native camera pipeline processing, yielding photos with deeper shadows and less aggressive sharpening, which preserves more natural tonal range for further editing.

Read at The Verge