Calotype vs Knurl Camera
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calotype
This app provides a streamlined RAW camera experience for photographers, offering direct access to DNG files without cloud services or extra processing. It features manual controls like shutter speed, ISO, and focus, along with interval shooting and exposure bracketing.
- RAW DNG file saving
- Manual camera controls (shutter, ISO, focus)
- Interval shooting for timelapses
- Exposure bracketing
- In-app gallery for review and sharing
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Calotype is a simple RAW camera for photographers who want a cleaner path from lens to file. Your iPhone already has a very capable camera. It also makes a lot of decisions before you ever see the photo. Calotype keeps things quieter. On supported back cameras, Calotype saves real RAW DNG files that you can take into the editor of your choice. No accounts, no cloud library, no extra processing layer. Manual controls are built around the camera you are actually using. Shutter speed follows the sensor’s real format limits, with ISO, focus, white balance, exposure offset, and focus peaking close at hand. You also get interval shooting for timelapses and hands-free captures, exposure bracketing for tricky light, and a simple in-app gallery for reviewing, sharing, and deleting recent shots. Calotype is made by a photographer, for the moments when you want the phone to feel a little more like a camera.
Knurl Camera
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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.
Screenshots
Verdict
The clearest difference is in-app purchases: Knurl Camera at none against Calotype's 1. On price and iOS requirement there is nothing between them.
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. Calotype sells 1 one-off in-app purchase. Knurl Camera asks for nothing beyond the download.
| Parameter | Calotype | Knurl Camera |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Ads | — | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | — |
| Devices | — | iPhone — better |
| Requires iOS | 18 | 18.0 |
| Further details — not scored | ||
| Size | 3 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Kyle Aaserud | Dimitrios Zarkadas |
In-app purchases
Calotype
- Calotype Pro$3.99
Knurl Camera
No in-app purchases









