Silver Lab vs Darkroom Companion

Developing film should feel like a craft, not a calculation. Silver Lab is a darkroom timer built for film photographers who want to focus on the process and not the math. Select your film stock and developer, dial in your temperature and push/pull, and Silver Lab handles the rest. Development times are pulled from an extensive B&W film chart and automatically adjusted for temperature compensation and push/pull processing. For C-41 color negative, the full standardized process is built in and ready to go. When the timer starts, Silver Lab guides you through every stage — agitation cycles, stop bath, fixer, and optional Permawash and Photo-Flo steps. The animated agitation timer tells you exactly when to agitate and when to let the film sit, so you can put the phone down between cycles and not think about it. Features - Automatic development time calculation across a large library of B&W film stocks and developers - Temperature compensation and push/pull adjustment - Configurable agitation timing — set your own initial agitation, rest interval, and cycle duration, independently for Developer and Fixer - Optional Permawash and Photo-Flo steps - C-41 color negative process with push/pull support - Screen stays on throughout development - Live Activity functionality for longer developments - No accounts. No ads. No data collection. Everything runs locally on your device.

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.