f vs Chronodev

The f-Stop Printing Calculator allows darkroom printers to modify times by stops when calculating exposure values. The calculator will establish 1/4 stop increments (+ or – up to 3/4) of the base time you have entered and, either generate a new time, or an increment of an f-stop if you are burning in. By working with f-stops rather than linear units of time, you can produce an easier to read test strip as the exposure differences are exactly equal. This app has been designed by Digitaltruth Photo Ltd and Bruce Tanner.

Transform your iPhone into an enlarger timer using Chronodev. Chronodev uses HomeKit-enabled wall plugs and lightbulbs to control your enlarger and safelights. Secondhand enlarger timers can be expensive and hard to find. This one costs the price of a wi-fi wall plug. - Control your enlarger and safelight with your iPhone or iPad - Expose prints accurately using the HomeKit-enabled timer - Manual enlarger control for focusing - Use the metronome for dodging and burning - Adjust times using EV stops - Automatically create test strips with incremental exposures, and keep track of exposure times using a handy graph - Automatically turn your safelight off when exposing/focusing - Voice control support for hands-free development - Safe to use in black and white darkrooms when using iOS's built-in red color filter A HomeKit-enabled wall plug and/or lightbulb is required to use all features of this app. Some features (like a basic timer and EV stop calculations) are available without a HomeKit-enabled device.