# f/ Tools vs Calibration Plus

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.

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.

## The numbers

| Metric | f/ Tools | Calibration Plus |
| --- | --- | --- |
| Price | $3.99 | **$2.99** |
| Rating | **[3.7 (6 ratings)](https://appshunter.io/ios/app/f-tools/id668237473/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/calibration-plus/id1414916538/reviews) |
| Number of ratings | **6** | 2 |
| Positive reviews | **93.3% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 21 months |
| Monetization | Paid | Paid |
| Best chart rank | **#192** | — |
| Size | 12 MB | 14 MB |
| Requires iOS | **15.5** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [David Quiles](https://appshunter.io/developer/578971109) | [Le bord de la piscine](https://appshunter.io/developer/456593417) |

## What reviewers say

### f/ Tools

[App page](https://appshunter.io/ios/app/f-tools/id668237473)

**Currently charting:** #192 Top Paid · Photo & Video (US App Store)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Calibration Plus

[App page](https://appshunter.io/ios/app/calibration-plus/id1414916538)

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.

**Highlights:** Fine tone control for digital negatives, Correction curve design, Reference chart generation, Alternate process printing aid, Improved print quality

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is f/ Tools free?

f/ Tools costs $3.99, with no in-app purchases.

### Is Calibration Plus free?

Calibration Plus costs $2.99, with no in-app purchases.

### Which has better reviews, f/ Tools or Calibration Plus?

f/ Tools is rated higher. f/ Tools averages 3.7 out of 5 from 6 ratings, while Calibration Plus averages 3.0 from 2 ratings.

### Do f/ Tools or Calibration Plus have ads?

Neither f/ Tools nor Calibration Plus shows ads.

### Which is updated more often, f/ Tools or Calibration Plus?

f/ Tools ships an update every 2 weeks, and Calibration Plus every 21 months. Most recently, f/ Tools was updated on September 23, 2026 and Calibration Plus on September 10, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*