Darkplug

Darkplug is a darkroom timer app for iPhone and iPad designed for film photographers and darkroom printers. It controls compatible smart plugs on a local network to manage enlarger exposure timing. The app features a red-on-black interface tested to avoid fogging photo paper, with controls optimized for low-light darkroom conditions.

Core features include straight print timing with optional count-in, F-Stop exposure steps, guided test strips, and complex dodge and burn planning with a grid system. Advanced workflows are available through Darkplug+, a one-time in-app purchase that adds split-grade printing, paper development timing, and reusable plan codes. Setup requires connecting a compatible Shelly smart plug to your local network.