Darkroom Companion: Dev Timer

Free film developing times and a multi-step darkroom timer for black-and-white film. Built-in development chart for common film and developer combinations, dilution calculator, reciprocity calculator and a red night mode. No subscription, no ads.

Whether you are developing your first roll or your thousandth, it keeps the whole process in one place.

FREE — NO SUBSCRIPTION, NO ADS

• Multi-step timer — developer, stop bath, fixer, wash, wetting agent — with sound and haptic agitation cues
• Night (red) mode that preserves your dark adaptation
• Development time calculator for bath temperature and push/pull (± stops)
• Built-in database of times for common film and developer combinations
• Dilution calculator — how much concentrate, how much water
• Celsius or Fahrenheit, whichever you think in
• Reciprocity calculator for long exposures
• One custom recipe and the last three developments in the log

DARKROOM PRO — one-time unlock, no subscription

• Unlimited custom recipes and custom process steps
• Chemistry log — tracks expiry and exhaustion, warns you before you pour dead fixer
• Unlimited development history
• Data export and import

Times are indicative. Verify them against the manufacturer datasheet before real use — the app reminds you as well.

PRIVACY

The app collects only anonymous usage statistics — which screens are opened and which features are used — so it can be improved. It does not send your recipes, log, notes or anything else you type into it, and it uses no advertising identifiers.