Halide: RAW Manual Camera for iPhone
iPhones keep getting better all the time. You can use them to capture amazing photos and videos everywhere you go. Halide for iPhone is a manual camera that gives you more control over your photos. It has a gesture-based interface with focus peaking and manual focus. You get a live histogram for adjusting exposure.
The app captures RAW or JPG shots. It has automatic and manual modes. It is compatible with various iPhone models but to get the most out of this app, including its RAW and Histogram features, you should probably consider getting a newer model.