PaperDeveloper

A precise wet-process timer.

PaperDeveloper is a precise darkroom timer for the full wet process of photographic paper.

Set your paper, chemistry, dilution, temperature and volumes. The app calculates times from manufacturer data. The built-in timer guides you through every step — developer, stop bath, fixer, wash, and optional toning.

Track multiple papers and test strips at once, and save quick presets.

KEY FEATURES • Timing for the full B&W paper wet process • Papers, chemistry, dilutions and temperatures • Multiple runs at once (paper + test strip) • Presets for quick setup • Chemical capacity / yield tracking • Red UI for darkroom use • Works offline — no account, no cloud

This version includes materials from FOMA, Ilford and Kentmere.

Important: the red interface helps in the darkroom, but PaperDeveloper is not a certified safelight. Please keep that in mind.

Enlarge — don’t scan!