# Darkroom Formulas — Photo Chemical Cookbook > Offline darkroom photography chemical formula database and mixer. (iPhone/iPad app by Freestyle Photo & Imaging.) - Source: https://appshunter.io/ios/app/darkroom-formulas/id807461207 (this page in markdown: same URL + `.md`) - Developer: [Freestyle Photo & Imaging](https://appshunter.io/developer/1786429988) - Category: Photo & Video, Utilities - Price: $5.99 - Rating: 2.50/5 from 4 App Store ratings · 7 written reviews indexed - Age rating: 4+ - Requires: iOS 9.0 · 2 MB - Languages: American English - Released: 2014-02-04 - Data updated: 2026-08-14 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/darkroom-formulas/id807461207/reviews.md ## What is Darkroom Formulas? 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. ## Key features - 160+ chemical formulas - Custom formula editing - Proportional volume mixer - Offline access - Formula export and backup - Supports multiple units ## Chart rankings - #195 in Top Paid · Photo & Video (US App Store) ## Recent user reviews (7 of 7) All indexed reviews: https://appshunter.io/ios/app/darkroom-formulas/id807461207/reviews.md ### 1/5 — Useless *2025-09-21* I can’t see the ml to adjust volume. White font against white background. Waste of money ### 3/5 — Would be quite helpful, but… *2024-06-05* The app is currently, as I write this, incompatible with Dark Mode. Attempts to change the quantity of finished chemicals result in white text on identical white background. I want to love this app, but dark mode needs to be fixed. ### 5/5 — Handy for quickly adjusting formulas *2022-12-24* I’ve been using it for several years…being able to make quick adjustments can be very useful. ### 1/5 — Doesn’t actually work… *2022-03-22* All the selectable amounts are blank, you can’t see what your dilution amounts are.. also missing my fixer. Stop bath and photo flow so useless anyway.. don’t waste your time and money! ### 1/5 — Graphical rendering issues leave app inoperable *2022-01-24* After just having downloaded this app (attempting in both iPhone and iPad), this app appears broken at present. The opening menu does not render beyond halfway down the length of the screen. Other screens are similarly broken. Of note, I tried the total volume selector inside the ‘new chemical wizard’, and got no keyboard or number prompt. Nor could I access any sort of dialog box. Please have a look at the code base. ### 5/5 — A good number of developers and other film/paper chemistry *2016-09-02* Pretty straight fowled. Seems pretty good as far as a database of recipes. Will have have to go through them a bit to see if anything is unique. But definitely a good quick reference and like the fact that it's available on my pad/phone whenever curious/needed. I like digital, but I love with film and paper analog processes... Devotion what can you say. ### 3/5 — Short on formulas and other basics.. *2014-09-01* I have been mixing darkroom chemistry for 20+ years and was disappointed by the lack of basic formulas, like plan old hypo fixer, 2L of H2O at 125f and 480g of Hypo.. Or one of the dozens of variations of Ansco 130. Also it needs some basic conversion tables, they do come in handy, and some basic safe handling instructions for the chemistry. I do like that I can add my formulations with notes for future reference. Right now the app is not worth the $6. ## Frequently asked questions about Darkroom Formulas ### What is Darkroom Formulas? Darkroom Formulas is a mobile application that serves as a digital cookbook for darkroom photography. It contains over 160 chemical formulas for developers, toners, and reducers, allowing users to mix solutions accurately. ### Does Darkroom Formulas have ads? No, Darkroom Formulas is ad-free. The app description explicitly states 'no ads, no add-ons', ensuring an uninterrupted user experience. ### How much does Darkroom Formulas cost? Darkroom Formulas is a paid application, available for a one-time purchase of $5.99. This price includes lifetime free updates. ### What devices support Darkroom Formulas? Darkroom Formulas is compatible with iPhone, iPad, and iPod devices. It requires iOS 4.3 or later. ### Can I add my own recipes to Darkroom Formulas? Yes, users can edit existing formulas and add their own favorite recipes within the app. This allows for personalization and storage of unique mixtures. ### Is Darkroom Formulas available offline? Yes, Darkroom Formulas includes all its data internally, meaning it can be used without an internet connection. This makes it ideal for use in a darkroom environment. ### How often is Darkroom Formulas updated? The app received its latest update on August 10, 2020, to version 2.1. The developer offers lifetime free updates for the application. ### What is the age rating for Darkroom Formulas? Darkroom Formulas has an age rating of 4+. This indicates it is suitable for users of all ages, with no mature content. ## Version history (last 5 releases) ### 2.1 — 2020-08-10 207 formulas now included. New units added: L, Kg, Pints, Quarts, Gallons. Small fixes and improvements. ### 2.0 — 2019-01-30 More formulas Improved display ### 1.1.1 — 2014-11-07 Bug fixes ### 1.1 — 2014-10-17 iOS8 and iPhone 6/6+ compatibility ### 1.0 — 2014-02-04 No release notes. ## Apps similar to Darkroom Formulas | App | Rating | Price | Category | | --- | --- | --- | --- | | [MetaLog](https://appshunter.io/ios/app/metalog/id1475309518) | 3.8 (12) | $0.99 | Photo & Video | | [Photo Timers](https://appshunter.io/ios/app/photo-timers/id6723898785) | — | Free | Photo & Video | | [Manual Flash Calculator](https://appshunter.io/ios/app/manual-flash-calculator/id6739006004) | — | $2.99 | Photo & Video | | [Neutral Density Calculator](https://appshunter.io/ios/app/neutral-density-calculator/id1343590260) | 3.5 (4) | $1.99 | Photo & Video | | [MyFilmRoll: Film Log & Tracker](https://appshunter.io/ios/app/myfilmroll-film-log-and-tracker/id6749644346) | 5.0 (1) | Free | Photo & Video | | [LFTools](https://appshunter.io/ios/app/lftools/id6479173686) | — | Free | Photo & Video | ## More apps by Freestyle Photo & Imaging - [Massive Dev Chart Timer](https://appshunter.io/ios/app/massive-dev-chart-timer/id402405770) - [f-Stop Printing Calculator](https://appshunter.io/ios/app/f-stop-printing-calculator/id858392735) - [Darkroom Lab Timer](https://appshunter.io/ios/app/darkroom-lab-timer/id1020149692) - [Phase Timer Pro](https://appshunter.io/ios/app/phase-timer-pro/id6443657713) All apps by Freestyle Photo & Imaging: https://appshunter.io/developer/1786429988 ## Related topics [dark room lab](https://appshunter.io/ios/topics/dark-room-lab) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-14.*