Knurl Camera vs ProCam Instrument
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Knurl Camera
Capture unprocessed RAW image data directly from your device's sensor. Offers granular manual controls for ISO, shutter speed, and focus, allowing for complete creative freedom in post-processing.
- Bayer RAW capture
- Full manual controls (ISO, Shutter, Aperture)
- Physical control dials
- Relative focus ring
- Native focal length lenses
- Exposure compensation scale
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Knurl is a camera for people who would rather develop the photo themselves. It captures true Bayer RAW: the sensor's own mosaic, written straight to a DNG with none of the computational photography that normally happens on the way. No multi-frame fusion, no tone curve, no sharpening. What lands in your library is undeveloped data with all of its latitude intact, ready for Lightroom or Photos to interpret however you like. THE CONTROLS ARE THE POINT A mode wheel you turn, with the real designations: P for program, Tv for shutter priority, Sv for ISO priority, M for full manual. Every position clicks. ISO and shutter move in thirds of a stop along the standard photographic ladders, on a dial that detents at every rung. Whole stops click harder than thirds, so you can count them by feel without looking. The ends of each ladder are the sensor's genuine limits rather than round numbers, which means base ISO, the cleanest the sensor gets, is actually reachable. Exposure compensation on its own scale, in thirds, with a firmer detent at zero. In manual it becomes the meter, because compensation has nothing left to act on when both controls are already fixed. An AF/MF switch and a focus ring you turn like a ring: relative, so touching it never jumps focus, and marked near to far rather than in invented distances. Three lenses, each at its native focal length, read from the hardware. HONEST ABOUT ITSELF Bayer RAW is 12 MP and does not permit zoom. The 48 MP path would mean Apple ProRAW, which is demosaiced and partially processed, so Knurl does not offer it. When the exposure you have asked for is not achievable, it says so rather than pretending. Your shots go to a Knurl album you can browse in the app, pinch to zoom, and swipe through. Volume buttons fire the shutter. Add the Control to your Action Button, Lock Screen or Control Center to open it without unlocking.
ProCam Instrument
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ProCam Instrument is a manual camera for people who already know what they want the picture to be. THE NUMBERS ARE THE INTERFACE ISO, shutter, white balance, exposure, focus and iris sit live above the shutter. Touch one and it comes off automatic onto a ruler that stops where the sensor stops — so what you dial is what the hardware can actually do. Pin the shutter and it is shutter priority; pin ISO too and it is manual, with the meter's needle showing how far off you are. WHAT IS WRITTEN IS YOUR CHOICE One control decides the file: HEIF, JPEG, Apple ProRAW, or Bayer RAW straight off the sensor with Apple's processing switched off. Or develop it with ProCam's own scene-linear pipeline — wavelet denoise, guided-filter tone mapping, halo-limited sharpening — and merge a bracket into one frame with multi-frame RAW fusion. MEASURE, DON'T GUESS Histogram, RGB parade, waveform, vectorscope, focus peaking, zebras and false colour all run on the GPU against the live signal. A focus magnifier punches the monitor in while you set focus. Frame guides, safe areas and anamorphic desqueeze change the viewfinder and never the file. FOR MOVING PICTURES Apple Log and Log 2, HLG, ProRes and ProRes RAW where the hardware offers them. Clip naming, QuickTime timecode, slate metadata, clip length and size limits that roll into the next clip, pause and resume, markers you can drop mid-take, a proxy copy, pre-roll that keeps the seconds before you pressed record, and a clean feed on a second screen. DRIVES A BODY WOULD HAVE Exposure and focus bracketing, focus stacking, an intervalometer, long exposure that builds in front of you, a night stack, and a star-trail mode that keeps the brightest each pixel has ever been. EVERY LENS, EVERY FEATURE The back lenses are one camera: changing focal length ramps the zoom instead of tearing the session down, so a lens change works mid-recording and nothing is gated on which lens you are on. Settings → System → Camera Capabilities reads every capability off the hardware at runtime and tells you what this iPhone can and cannot do — no guessing from the model name. THE REST A gallery with a metadata inspector that shows what the file actually says; a non-destructive editor with curves, HSL, colour grading, masks and lens corrections; Siri and Shortcuts; Lock Screen and Control Center capture; a second iPhone as a remote; and a hardware self-test that sets every control, reads it back from the sensor, and reports what passed. PRIVACY No accounts, no analytics, no advertising, no third-party SDKs. Nothing leaves your iPhone. Location is written into a photo's EXIF only when you switch Location Tagging on.
Screenshots
Verdict
Knurl Camera and ProCam Instrument are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Knurl Camera | ProCam Instrument |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone | iPhone |
| Requires iOS | 18.0 | 18.0 |
| Further details — not scored | ||
| Size | 1 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | Dimitrios Zarkadas | SUKRU UTKU POYRAZ |
In-app purchases
Knurl Camera
No in-app purchases
ProCam Instrument
No in-app purchases
Questions
Is Knurl Camera free?
Is ProCam Instrument free?
Do Knurl Camera or ProCam Instrument have ads?
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