CalcuLight vs Oqra Cam
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CalcuLight
This app provides advanced light metering for film photographers, offering multiple metering modes and exposure control options. It helps users achieve precise exposures for their shots, with features like Zone System display and a log book for tracking. A free version is available, with an optional Pro upgrade for more advanced tools.
- Center Weighted metering
- 3D Matrix metering
- Spot metering (Pro)
- Calculated metering (Pro)
- Shutter Priority metering
- Aperture Priority metering (Pro)
- Zone System overlay (Pro)
- Log book with GPS (Pro)
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CalcuLight is a powerful, intuitive light meter for film photographers who want more than a handheld meter can offer. METERING MODES Center Weighted: Classic center focused metering (approximately 30 degree field of view), similar to vintage film cameras. Matrix: Full frame averaging for tricky scenes. Uses your camera's EXIF data for the fastest possible readings. Spot (Pro): Measure a precise 5% area of the frame. Tap anywhere to position the metering point. Calculated (Pro): Tap up to five areas for an averaged reading, plus the brightness range between your darkest and brightest points. Set your film type and CalcuLight warns when a scene's contrast will not fit. EXPOSURE COMBINATION SCALE Instead of a single pair of numbers, the readout shows a scale of equivalent exposures, so you can see at a glance that 1/125 at f/5.6 matches 1/250 at f/4. Swipe to scroll through combinations, or tap one to switch instantly. Combinations your camera cannot reach are flagged before you commit. EXPOSURE CONTROLS Shutter Priority: Set your shutter speed. Aperture Priority (Pro): Set your aperture. EV Compensation: Per shot adjustment in full, half, or third stops. ISO, shutter, and aperture (Pro) values in full, half, or third stop increments. Camera Range Limits (Pro): Restrict ISO, shutter and aperture to what your gear can actually do. Apertures reach f/0.7 for fast optics like the Noctilux. SHOOTING PROFILES (Pro) Save a named setup for how you are actually shooting: the film, how you are rating it, and the filter on your lens. Push and pull in third stops, up to three either way. Push two stops on ISO 400 film and CalcuLight meters it as EI 1600. Filter compensation up to ten stops, from a yellow filter to an ND10. Switch setups from the viewfinder. The active profile is always shown on screen, so a reading is never quietly adjusted without you seeing why. ZONE SYSTEM VALUE DISPLAY (Pro) Displays the current zone from 0 to X beside your metering point. In Calculated mode, each point shows its own zone value. LIVE HISTOGRAM (Pro) Real time RGB histogram to catch clipped highlights and blocked shadows before you shoot. Toggle combined RGB, red, green, and blue channels. LOG BOOK (Pro) Save every reading with full exposure data, metering mode, GPS location (choose precise or general) and timestamp. Notes are pre-populated with captured values in Calculated mode. Export as CSV, JSON, or plain text. MULTI-LANGUAGE SUPPORT English, 简体中文, 繁體中文, 日本語, 한국어, हिन्दी, Русский, Deutsch, Français, Español, Português, Nederlands FREE vs PRO The FREE version is completely ad-free and covers over 90% of what film shooters need for exposure metering. Free version features: Center Weighted and Matrix metering Shutter Priority metering Exposure combination scale EV compensation Single metering mode ISO, shutter and EV compensation stop increments Light and dark themes Portrait and landscape with orientation lock Overlay transparency All 12 languages Pro version: All free version features Spot metering with adjustable area Calculated metering Aperture Priority metering Shooting profiles with push/pull and filter compensation Vintage camera shutter speed options Zone System overlay Live histogram Log book with optional GPS location recording Continuous metering mode Global EV offset Exposure settings range limits Aperture stop increment control cd/m2 display Remember settings between sessions Silent metering (turn off the meter beep) Experimental features (lens switch) You can try Pro version at no cost for 14-days. After that, you can access the Pro version in two ways: Pay as you go for only $0.99 USD per month to access all Pro features (cancel any time); or $14.99 USD for lifetime access to all Pro features and future updates. Privacy Policy: https://calculight.ocutrain.com/privacy-policy.html Terms of Service: https://calculight.ocutrain.com/terms-of-service.html
Oqra Cam
This app allows you to shoot photos with the aesthetic of film photography. Choose from ready-made presets or customize color, grain, and tonal response to create your unique style. Share your custom looks with others via QR codes or links.
- Film-inspired photo presets
- Customizable color, grain, and tone
- Live preview in viewfinder
- Shareable custom recipes (QR/link)
- RAW and ProRAW capture
- Live Photos and Film Clips
- Lock Screen control
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Oqra is an iPhone camera app built around the imaging characteristics of film photography. Shoot with ready-made presets, or adjust physical properties such as color, grain, halation, and tonal response to create a photographic style of your own. Every photo is developed on your device. PICK A LOOK. POINT AND SHOOT. Choose a recipe and compose with a live preview of its character in the viewfinder. Every shot comes out developed, with no separate editing step. MAKE LOOKS YOURS. Recipes can bring back the familiar colors of film or explore bolder colors and textures. They are tools for creating a look, not copies of specific film stocks. Start from a preset or build your own: shape color, grain, halation, and the response from shadows to highlights, or go deeper with individual emulsion layers, dye settings, and H&D response curves. In-app guides explain each control as you explore. SHARE THE RECIPE, NOT JUST THE PHOTO. Export a photo as a poster on white or black paper. Oqra Morse, the line of dots along its edge, carries the recipe, so anyone with Oqra can import the poster and shoot with the same look. Live Photos and Film Clips become moving posters. You can also share recipes as QR codes or links, and scan a friend’s code to add it to your collection. FILM CHARACTER. RAW DETAIL. Capture and develop Apple ProRAW or RAW DNG, up to 48 MP on supported iPhones and cameras. Turn on Keep RAW Original to save the DNG with your developed photo, then change its recipe later in the Album. Choose M, L, or XL HEIC files to balance size and detail. KEEP THE MOMENT MOVING. Capture Live Photos with the look in both the still and the motion, or record Film Clips up to 30 seconds long. READY FROM THE LOCK SCREEN. Open Oqra from its Lock Screen control, or assign it to Camera Control on supported iPhones. Your selected recipe is ready when the camera opens. PRIVATE BY DESIGN. Every photo is developed on your iPhone. No Oqra account, and nothing is uploaded for processing. Live Photos, Film Clips, and unlimited custom recipes require a one-time in-app purchase. No subscription. REQUIRES iOS 18 or later. iPhone 12 or newer, or iPhone SE (3rd generation). Apple, iPhone, Live Photos, ProRAW, and Camera Control are trademarks of Apple Inc. DNG is a trademark of Adobe Inc. Oqra is an independent product and has not been authorized, sponsored, or approved by Apple Inc.
Screenshots
Verdict
The clearest difference is update cadence: Oqra Cam at every 4 days against CalcuLight's monthly. CalcuLight's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 18.0). On price, rating, ratings volume and ads 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. CalcuLight sells 2 in-app purchases, starting at $0.99 per month and Oqra Cam sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for CalcuLight against 5.0 for Oqra Cam. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
CalcuLight ships an update monthly, Oqra Cam every 4 days. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.
| Parameter | CalcuLight | Oqra Cam |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (1 ratings) |
| Number of ratings | 2 — better | 1 |
| Update frequency | Monthly | Every 4 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 18.0 |
| Further details — not scored | ||
| Size | 40 MB | 33 MB |
| Age rating | 4+ | 4+ |
| Developer | Li Fan | 匡明 秦 |
Customer experience
CalcuLight
Oqra Cam
In-app purchases
CalcuLight
- CalcuLight$0.991 Month
- CalcuLight$14.99
Oqra Cam
- A Small Print$2.99
- A Medium Print$4.99
- A Large Print$9.99









