Darkroom Timer: Film Develop
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About this app
Time every bath in your film development workflow with precision, clear agitation alerts, and an integrated chemistry dilution calculator.
Darkroom Timer: Film Develop is built for analog photographers developing 35mm, 120, and sheet film at home or in a shared darkroom. Its safelight-inspired dark interface uses high-contrast typography and large countdown numerals designed for easy reading during timed sequences.
MULTI-STEP DEVELOPMENT TIMER
- Follow each chemical bath step by step with a visual progress ring and large tabular countdown digits.
- Receive sound and vibration cues for agitation intervals and step completions, with quick toggles right on the timer screen.
- Configure initial agitation at start, repeat intervals, and agitation durations per step.
- Keep your screen awake while a timer is running, or pause and resume later without losing progress.
CURATED PRESETS AND CUSTOM RECIPES
- Start quickly with eight built-in reference presets covering B&W 400, B&W 125, B&W 100, and C-41 rotary processes, complete with source chart links and process notes.
- Search recipes by name, film, developer, or step, and filter by All, Favorites, Presets, or My recipes.
- Create your own multi-step recipes from scratch or duplicate any preset to adjust step durations, order, and agitation cues.
CHEMISTRY DILUTION CALCULATOR
- Enter any stock-to-water ratio and target volume to calculate exact stock solution and water quantities.
- Switch seamlessly between mL and US fl oz with automatic volume conversion and a visual mix proportion bar.
SESSION LOG AND BACKUP
- Automatically log completed runs with actual step durations and skipped-step records.
- Save notes on film stock, push/pull ratings, bath temperatures, and results for every session.
- Export and restore full JSON backups of your recipes, favorites, sessions, and cue settings with no account required.
SAFETY AND PROCESS NOTE
Always confirm development times, temperatures, agitation schedules, and protective equipment against the manufacturer instructions and safety data for your exact film and chemistry. Load unprocessed film in total darkness, as any display emits light.
Darkroom Timer: Film Develop is built for analog photographers developing 35mm, 120, and sheet film at home or in a shared darkroom. Its safelight-inspired dark interface uses high-contrast typography and large countdown numerals designed for easy reading during timed sequences.
MULTI-STEP DEVELOPMENT TIMER
- Follow each chemical bath step by step with a visual progress ring and large tabular countdown digits.
- Receive sound and vibration cues for agitation intervals and step completions, with quick toggles right on the timer screen.
- Configure initial agitation at start, repeat intervals, and agitation durations per step.
- Keep your screen awake while a timer is running, or pause and resume later without losing progress.
CURATED PRESETS AND CUSTOM RECIPES
- Start quickly with eight built-in reference presets covering B&W 400, B&W 125, B&W 100, and C-41 rotary processes, complete with source chart links and process notes.
- Search recipes by name, film, developer, or step, and filter by All, Favorites, Presets, or My recipes.
- Create your own multi-step recipes from scratch or duplicate any preset to adjust step durations, order, and agitation cues.
CHEMISTRY DILUTION CALCULATOR
- Enter any stock-to-water ratio and target volume to calculate exact stock solution and water quantities.
- Switch seamlessly between mL and US fl oz with automatic volume conversion and a visual mix proportion bar.
SESSION LOG AND BACKUP
- Automatically log completed runs with actual step durations and skipped-step records.
- Save notes on film stock, push/pull ratings, bath temperatures, and results for every session.
- Export and restore full JSON backups of your recipes, favorites, sessions, and cue settings with no account required.
SAFETY AND PROCESS NOTE
Always confirm development times, temperatures, agitation schedules, and protective equipment against the manufacturer instructions and safety data for your exact film and chemistry. Load unprocessed film in total darkness, as any display emits light.
Film developing timer with agitation cues, presets, and dilution calculator.
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What’s new
Initial release of Darkroom Timer: Film Develop with multi-step darkroom timers, agitation cues, B&W and C-41 presets, a dilution calculator, and session logs.
