Calibration Plus vs ObscuraFlex
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calibration Plus
This app aids in creating digital negatives for alternate process printing, offering fine tone control. It helps achieve better prints with improved dark, white, and halftone tones by designing correction curves. Generate reference charts and use image processing software to refine your digital negatives for perfect prints.
- Fine tone control for digital negatives
- Correction curve design
- Reference chart generation
- Alternate process printing aid
- Improved print quality
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Calibration+ helps you for alternate process printing, by allowing fine tone control on your digital negatives. For instance, the cyanotype process is contrasted with poor half tones. Calibration+ helps you to have better prints with dark, white and halftones by designing a correction curve. With Calibration+, generate a reference chart on your device. Use your favorite image processing software :Adobe Photoshop™, Gimp, Affinity Photo™, Lightroom™… to generate digital negative. Invert. Flip. Print (as usual). Photograph the print! Calibration+ computes the adjustment curve in your photo software to have perfect prints.
ObscuraFlex
This app provides a high-resolution, right-side-up live feed of your large format camera's image plane. It enhances composition and focusing, offering greater detail and clarity than a standard ground glass. Use it to shoot stills, video, or reference images alongside your film negatives.
- High-resolution live feed
- Right-side-up image display
- Composition and focusing aid
- Supports various large format cameras
- Capture stills and video
- Reference image creation
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ObscuraFlex is a camera app designed for use with the ObscuraFlex™ large format camera viewfinder adapter for cameras including 4x5 Graflex, Linhof, Chamonix, and some vintage Polaroid cameras. The app provides a high resolution live feed of your large format camera's image plane (ie: ground glass) rotated to reverse the upside-down image created by any traditional optical system. When using the camera adapter as a composition and focusing aid for large format film photography the ObscuraFlex™ provides a greater level of detail and clarity than working with a standard ground glass, and with an image that's right-side-up! You can also use the adapter with this app (or other camera app) to shoot stills, video, or reference images to accompany your film negatives.
Screenshots
Verdict
The clearest difference is review sentiment: ObscuraFlex at 100% against Calibration Plus's 50%. ObscuraFlex also leads on price (Free vs $2.99) and rating (5.0 vs 3.0). Calibration Plus's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 18.0). On ratings volume, ads and in-app purchases 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
ObscuraFlex is free to download; Calibration Plus costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ObscuraFlex holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews point the same way: 50% of Calibration Plus's written reviews are positive against 100% of ObscuraFlex's.
Calibration Plus ships an update every 21 months, ObscuraFlex every 5 weeks. The most recent releases landed on October 14, 2026 and October 7, 2026 respectively.
| Parameter | Calibration Plus | ObscuraFlex |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 3.0 (2 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 2 | 2 |
| Update frequency | Every 21 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 14 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Le bord de la piscine | Toby Wilkins |
Customer experience
Calibration Plus
ObscuraFlex
In-app purchases
Calibration Plus
No in-app purchases
ObscuraFlex
No in-app purchases
Questions
Is Calibration Plus free?
Is ObscuraFlex free?
Which has better reviews, Calibration Plus or ObscuraFlex?
Do Calibration Plus or ObscuraFlex have ads?
Which is updated more often, Calibration Plus or ObscuraFlex?
Other comparisons
