f/ Tools vs Darkroom Formulas
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
Darkroom Formulas
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.
- 160+ chemical formulas
- Custom formula editing
- Proportional volume mixer
- Offline access
- Formula export and backup
- Supports multiple units
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Darkroom Formulas contains a database with over 160 chemical formulas from Digitaltruth.com including film developers, print developers, toners, reducers, intensifiers and more. Users can edit existing formulas or add their own favorite recipes. The app contains a powerful Volume Mixer allowing all ingredients to be adjusted proportionally on-the-fly. No more messing around with complex calculations, simply change the final volume and every ingredient changes automatically! Your own saved formulas can be exported and shared by email, or stored externally as a back up. The app includes all the data internally, so there is no need to connect to the internet to use it. Simply download and store in your pocket. Ideal for lab technicians and other darkroom users who need to mix formulas from scratch. Formulas can include up to 3 part mixes (eg. Part A, Part B, Part C) and each part can contain up to 10 ingredients, allowing a maximum total of 30 ingredients. Available units are ml, g, fl oz, oz, tsp, grains and drops. Lifetime free updates, no ads, no add-ons.
Screenshots
Verdict
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.
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 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.
| Parameter | f/ Tools | Darkroom Formulas |
|---|---|---|
| Price | $3.99 — better | $5.99 |
| Rating | 3.7 (6 ratings) — better | 2.5 (4 ratings) |
| Positive reviews | 93.3% of reviews — better | 28.6% of reviews |
| Number of ratings | 6 — better | 4 |
| Update frequency | Every 2 weeks — better | Every 14 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | #95 — better | #185 |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.5 | 9.0 — better |
| Further details — not scored | ||
| Size | 12 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | David Quiles | Freestyle Photo & Imaging |
Customer experience
f/ Tools
Darkroom Formulas
In-app purchases
f/ Tools
No in-app purchases
Darkroom Formulas
No in-app purchases
Questions
Is f/ Tools free?
Is Darkroom Formulas free?
Which has better reviews, f/ Tools or Darkroom Formulas?
Do f/ Tools or Darkroom Formulas have ads?
Which is updated more often, f/ Tools or Darkroom Formulas?
Which is more popular, f/ Tools or Darkroom Formulas?
Other comparisons
