f/ Tools vs Calibration Plus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
f/ Tools
This photography tool offers a suite of calculators for concepts like depth of field, print resolution, and flash exposure. It helps users visually grasp complex photographic principles with integrated help and a glossary. The app also includes a camera bag feature with lens limits.
- Graphic depth of field calculator
- Graphic Airy disc calculator
- Graphic format calculator
- Motion freeze calculator
- Graphic blur size calculator
- Graphic flash exposure calculator
- Camera bag with lens limits
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f/Tools is a set of tools for digital and analog photography. Explore sensor sharpness, depth of field, print resolution, bokeh size, flash exposure, and more — all in one place. Designed to help you visually understand complex photographic concepts, with built-in help and a glossary. Features: • Graphic depth of field calculator • Graphic Airy disc calculator • Graphic format (scene/print) calculator • Motion freeze calculator • Graphic blur size calculator • Graphic flash exposure calculator • Camera bag with lens limits • Quick setup with popular camera brands included
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.
Screenshots
Verdict
The clearest difference is review sentiment: f/ Tools at 93% against Calibration Plus's 50%. f/ Tools also leads on rating (3.7 vs 3.0) and update cadence (every 2 weeks vs every 21 months). Calibration Plus's advantage is price ($2.99 vs $3.99). On ads, in-app purchases, monetization model and device support 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
f/ Tools costs $3.99 and Calibration Plus $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
f/ Tools holds the better App Store score, 3.7 against 3.0. Both are backed by a comparable volume of ratings — 6 and 2 respectively. Written reviews point the same way: 93% of f/ Tools's written reviews are positive against 50% of Calibration Plus's.
f/ Tools ships an update every 2 weeks, Calibration Plus every 21 months. The most recent releases landed on September 23, 2026 and September 10, 2026 respectively.
| Parameter | f/ Tools | Calibration Plus |
|---|---|---|
| Price | $3.99 | $2.99 — better |
| Rating | 3.7 (6 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 93.3% of reviews — better | 50.0% of reviews |
| Number of ratings | 6 — better | 2 |
| Update frequency | Every 2 weeks — better | Every 21 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | #192 — better | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.5 — better | 15.6 |
| Further details — not scored | ||
| Size | 12 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | David Quiles | Le bord de la piscine |
Customer experience
f/ Tools
Calibration Plus
In-app purchases
f/ Tools
No in-app purchases
Calibration Plus
No in-app purchases
Questions
Is f/ Tools free?
Is Calibration Plus free?
Which has better reviews, f/ Tools or Calibration Plus?
Do f/ Tools or Calibration Plus have ads?
Which is updated more often, f/ Tools or Calibration Plus?
Other comparisons
