# f/ Tools vs Darkroom Formulas

The clearest difference is review sentiment: f/ Tools at 93% against Darkroom Formulas's 29%. f/ Tools also leads on rating (3.7 vs 2.5) and update cadence (every 2 weeks vs every 14 months). Darkroom Formulas's advantage is iOS requirement (9.0 vs 15.5). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

f/ Tools costs $3.99 and Darkroom Formulas $5.99 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 2.5. Both are backed by a comparable volume of ratings — 6 and 4 respectively. Written reviews point the same way: 93% of f/ Tools's written reviews are positive against 29% of Darkroom Formulas's.

f/ Tools ships an update every 2 weeks, Darkroom Formulas every 14 months. The most recent releases landed on October 1, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | f/ Tools | Darkroom Formulas |
| --- | --- | --- |
| Price | **$3.99** | $5.99 |
| Rating | **[3.7 (6 ratings)](https://appshunter.io/ios/app/f-tools/id668237473/reviews)** | [2.5 (4 ratings)](https://appshunter.io/ios/app/darkroom-formulas/id807461207/reviews) |
| Number of ratings | **6** | 4 |
| Positive reviews | **93.3% of reviews** | 28.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 14 months |
| Monetization | Paid | Paid |
| Best chart rank | **#124** | #197 |
| Size | 12 MB | 2 MB |
| Requires iOS | 15.5 | **9.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [David Quiles](https://appshunter.io/developer/578971109) | [Freestyle Photo & Imaging](https://appshunter.io/developer/1786429988) |

## What reviewers say

### f/ Tools

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

**Currently charting:** #124 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


### Darkroom Formulas

[App page](https://appshunter.io/ios/app/darkroom-formulas/id807461207)

**Currently charting:** #197 Top Paid · Photo & Video (US App Store)

This app provides a digital cookbook of over 160 chemical formulas for darkroom photography. It features a volume mixer for easy proportional adjustments and allows users to save, edit, and share their own recipes. Access all data offline, making it a convenient tool for photographers.

**Highlights:** 160+ chemical formulas, Custom formula editing, Proportional volume mixer, Offline access, Formula export and backup, Supports multiple units

**Features:** macOS Compatibility, 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 Darkroom Formulas free?

Darkroom Formulas costs $5.99, with no in-app purchases.

### Which has better reviews, f/ Tools or Darkroom Formulas?

f/ Tools is rated higher. f/ Tools averages 3.7 out of 5 from 6 ratings, while Darkroom Formulas averages 2.5 from 4 ratings.

### Do f/ Tools or Darkroom Formulas have ads?

Neither f/ Tools nor Darkroom Formulas shows ads.

### Which is updated more often, f/ Tools or Darkroom Formulas?

f/ Tools ships an update every 2 weeks, and Darkroom Formulas every 14 months. Most recently, f/ Tools was updated on October 1, 2026 and Darkroom Formulas on October 7, 2026.

### Which is more popular, f/ Tools or Darkroom Formulas?

f/ Tools currently peaks at #124 in the App Store charts, and Darkroom Formulas at #197. Chart position reflects recent download velocity rather than total install base.

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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.*