Darkroom Formulas contains a database with over 160 chemical formulas from 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.

What’s New

Version 2.1

207 formulas now included.
New units added: L, Kg, Pints, Quarts, Gallons.
Small fixes and improvements.

Ratings and Reviews

5.0 out of 5
1 Rating

1 Rating

T. Jinkinz ,

A good number of developers and other film/paper chemistry

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.

fafa72 ,

Short on formulas and other basics..

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.

App Privacy

The developer, Digitaltruth Photo Ltd, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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