DevProCo vs FilmDev

DevProCo is a precise development process timer for analog photographers — whether you're developing B&W film, color negative (C-41), slide film (E-6), or darkroom prints (RA-4). FEATURES • Guided step-by-step development sessions with automatic agitation reminders • Text-to-speech announces each step and agitation — keep your hands in the tank • Automatic chemistry volume and dilution calculator • Built-in process library with pre-configured recipes (Rodinal, DD-X, C-41, RA-4) • Create and save your own custom processes • Share processes with other DevProCo users via QR code • Screen stays on during active sessions • Supports English, German, Spanish and French

FilmDev is a darkroom-safe multi-stage timer built for home film developers — B&W and C-41, push/pull, and beyond. ■ Multi-stage auto-advance timer Set up develop, stop, fix and wash stages once. FilmDev counts each stage down and auto-advances to the next — no fumbling for a stopwatch in the dark. ■ True darkroom-safe screen Running timer screen is pure black with a deep red display only — no white pixels, no accidental flash. Fullscreen immersive, safe for your eyes and your film. ■ Haptic + beep agitation cues Feel and hear when it's time to agitate — configurable haptic pulses and beep cues so you don't need to watch the screen. ■ Wall-clock accurate, even backgrounded Timing is based on real elapsed time, not a fragile in-app counter — lock your phone or switch apps and the timer stays accurate when you come back. ■ Temperature compensation Adjust develop time for your actual chemistry temperature using a standard B&W time-temp factor. A guide, not a guarantee — always verify against your own testing. ■ Your own recipe library Build and save your own recipes — film stock, developer, dilution, temperature, and every stage. Starter recipes are included from manufacturer datasheets, clearly marked "verify before use." Your recipes, your times. ■ Develop log Log every roll you develop — recipe used, film, developer, notes and a rating — so you can track what worked. ■ FilmDev Pro (one-time purchase) Unlock unlimited recipes, remove ads, and export/import your recipe library as JSON. One-time purchase, no subscription. ■ 8 languages, private by design No account, no cloud. Everything — recipes and logs — stays on your device.