Camera apps that put the controls where you can see them
Manual capture, tethering and RAW, where the viewfinder and the controls are competing for the same glass and one of them always loses.
A camera app has a problem no other app has: the main view has to stay the main view. You cannot collapse the viewfinder to make room for a histogram, because the viewfinder is what you are using. So every control is either an overlay sitting on top of the frame you are composing, or a panel that pushes the frame smaller.
On a folded phone that is a real trade, and the manual-control apps feel it most — they are the ones with the most to show. Unfolded, the controls can sit beside the image rather than on it, which is the arrangement every camera that is not a phone has used for decades.
The last two entries are the other end of the same workflow, where the frame has already been taken and the question is what you can see while deciding about it.
- 1
Halide Mark III - Pro Camera
Lux Optics Incorporated
Manual controls, RAW, and film-simulation Looks applied at capture rather than afterwards — a camera app built for people who want to see what they are doing to the image. Everything it offers is a readout or a control, and all of it is currently stacked on top of the picture it is describing.
- 2
Blackmagic Camera
Blackmagic Design Inc
Frame rate, shutter angle, white balance and ISO, laid out the way the company's own cameras lay them out, recording to industry-standard formats. That interface was designed for a camera body with a dedicated screen; a phone is asked to be both the body and the monitor at once.
- 3
Project Indigo
Adobe Labs, Inc.
A computational pipeline with a full set of manual controls over the top, from a research group publishing its workings. The interesting part is the burst-and-combine process, and the controls that steer it are the ones you want visible rather than buried.
- 4
Capture One
Capture One A/S
Tethering a proper camera to the phone, wired or wireless, so shots land for review, rating and colour tagging as they are taken. The entire point is judging an image on arrival, usually with somebody else looking over your shoulder, and that is a job done at whatever size the screen allows.
- 5
Darkroom: Photo & Video Editor
Photo editing · Bergen Co.
Where the frame ends up: RAW editing with the filmstrip, the adjustment and the photograph all wanting to be on screen together. On a folded phone one of the three is always hidden, and the thing you lose is the ability to compare the edit with the ones either side of it.
The selection and the order are ours. Each entry is written from that app’s own App Store listing, linked beside it, and this page from Apple's iPhone Duo product page. Drafted with AI assistance and checked back against those sources before publishing; the disclosure page explains how. The iPhone Duo has been on sale since 23 October 2026 and nothing here has been seen running on one, so what each entry says about the fold is an argument rather than a test.