Darkroom Toolkit vs PaperDeveloper

Process film and print in the darkroom, without the math. Darkroom Toolkit is a reference library and set of utilities for film processing and darkroom printing. Browse hundreds of photochemistry formulas, run step-by-step development timers with official manufacturer dev times, and handle common calculations – all in one app. WHY DARKROOM TOOLKIT? • One app instead of separate dev chart, formula, and printing calculator apps • Primary features are free: all darkroom chemistry formulas, official processes, and calculators included • Lifetime Pro unlock for saving favorites, custom workflows, and to support the project FILM DEVELOPING • Pre-configured timers for manufacturer-recommended film + developer combinations • Multi-step processing with optional audio alerts • iOS Live Activity: see your timer on the lock screen • Low light / safelight theme for working in the dark FORMULAS & CHEMISTRY • Extensive darkroom cookbook: developers, toners, lith, alt process, and more • Enter your target volume and every ingredient amount scales automatically • Dilution and solution strength conversion utilities DARKROOM PRINTING • f-Stop printing calculator: exposure sequences and test strip times • Print resizing calculator: new exposure times when changing print size PRO FEATURES (one-time purchase) • Save favorite processes and formulas • Create and edit custom recipes and processing timers • Sync your workflows across devices Whether you're developing your first roll of black and white film, mixing chemistry for cyanotype, or dialing in enlarger exposures, Darkroom Toolkit keeps you consistent. Download free. Upgrade once, yours forever.

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!