THE USEFUL TECH
📘 THE DEEP DIVE · WEDNESDAY TUTORIAL · ISSUE #014
👋 HEY, IT'S RAJA
Take a photo of someone's face in dim light, then zoom in. The skin is smooth, the shadows are lifted and every edge is a little too sharp. Your iPhone did all of that before the photo reached your library.
Today, what happens in that half second, why ProRAW doesn't undo it, and 5 camera apps that skip it.
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📘 What your iPhone does to a photo before you see it
Smart HDR, Deep Fusion, and the file Apple's Camera app can't save.
The half second after you press the shutter
Your iPhone starts capturing frames before you tap. When you press the shutter, it picks several of them, merges them into one image and runs the result through a stack of processing.
Smart HDR lifts the shadows and pulls back the bright parts. It's why a sunset can come out looking flat.
Deep Fusion kicks in for mid and low light. It combines frames pixel by pixel to pull out texture. A sweater looks great. Skin looks sharpened.
Noise reduction and sharpening clean up grain and crisp up edges. Zoom in on a face and this is the plastic look.
Tone mapping squeezes all of it into something that looks bright and punchy on a phone screen.
For a receipt, a whiteboard or a menu, that's exactly what you want. For a portrait of someone you love, it's why the photo feels more like a render than a memory.
Why ProRAW doesn't fix it
If you own a Pro iPhone, you've probably switched on Apple ProRAW. It gives you more room to edit, but it isn't an untouched file. ProRAW starts from the same merged capture, with Apple's multi-frame processing already folded in.
A true Bayer RAW is different. It's a single readout straight off the sensor, before any merging. Apple's Camera app can't save one. Some third-party apps can, and #1 below is built around it.
The 2-minute test
Find a face or a textured wall in indoor light.
Take one photo with the Camera app.
Take the same photo with any app below.
Open both in Photos and pinch to zoom on the eyes or the skin.
You'll see the difference in about 2 seconds.
#1 LibreCam, for the most honest file an iPhone can make
LibreCam switches off every processing step the iPhone allows: Smart HDR, Deep Fusion, noise reduction, sharpening and tone mapping. Where something can't be turned off, the app tells you instead of pretending.
Every shot saves 2 files. One is a true Bayer DNG straight off the sensor, for Lightroom or Darkroom. The other is a single-frame HEIF you can share right away. On the iPhone 18 Pro you get 10 aperture positions, 6 more than Apple's own Camera app.
It only asks for add-only access to Photos, so it can save new pictures but never read your library. No account and no tracking. Free to download, with a one-time Pro unlock.
#2 Lampa, for a film look straight out of the camera
Lampa skips HDR and AI processing and develops every shot from RAW, using colour profiles inspired by 35mm film and the compact digital cameras of the 2000s. Because it processes the RAW data at capture, the developer says you can't get the same result by editing a stock photo afterwards.
Skin stays soft and shadows keep their depth. It also shoots 4K at 60fps with the same profiles and real grain, and records in Log on the iPhone 15, 16 and 17 Pro. It opens straight from the Lock Screen.
Free to download, with in-app purchases to unlock everything.
#3 Zerocam, for people who hate settings
Zerocam has one button and almost nothing else on screen. No menus, no processing tricks in the background, and none of the halos you get around buildings against a bright sky.
Version 2.0 added lens switching, RAW plus JPG saving, a multi-exposure mode and Zero Looks, subtle film-style colour grades that update every month. It's on Android too, so a shared album can have one look across both phones. Free to download, with in-app purchases.
#4 Phlow, for RAW without a camera roll full of duplicates
Phlow shoots in its own PhlowRAW format with no Fusion processing, and shows film presets live in the viewfinder while you frame.
The reason to install it is PhlowSync. Every edit syncs back to the same RAW file in Photos without touching the original data, so you never end up with IMG_4521.DNG and IMG_4521-edited.jpg sitting side by side. There's also an interval camera that fires up to 30 shots on a timer. It runs on a subscription, so it suits people who already edit their photos.
#5 Better Camera, for manual control without the clutter
Better Camera gives you ISO and shutter by hand or on auto, Shutter Priority and ISO Priority modes, 3 focus modes with focus peaking and a live histogram. Photos save as HEIF, JPEG or lossless TIFF, with 10 film simulations on top.
The pricing works like film. You start with a free roll of 36 shots, then buy another roll or buy the whole camera once. No subscription. It's made by Davyd Horhiashvili, a photographer with about 20 years behind film and digital cameras.
Which one to start with
Start with LibreCam if you want the most honest file. Pick Zerocam if you never want to touch a setting, and Lampa if you want photos and video that look like film. Phlow is for people who already edit RAW, and Better Camera is for anyone who wants real controls without a cockpit of buttons.
📷 All 5 are free to try. Run the 2-minute test with one of them tonight, on a face you know well.
Fix the rest of your iPhone too
The iPhone Power User Fix Book is my guide to 45 fixes across 10 of the apps Apple puts on every iPhone. Each one is a setting or a habit that takes about a minute, and every update comes free.
See you Friday.
Keep it useful,
Raja · The Useful Tech
P.S. Enjoyed this? Forward it to a friend who loves their Apple gear a little too much.