DisparaTimer vs TimerGlass

DisparaTimer is a mobile app that, when connected to a Raspberry Pico W/WH, can control the exposure time of a photographic enlarger using a power relay. The physical setup is inexpensive and easy to assemble. DisparaTimer has two operation modes. The first is a traditional timer mode, where you set a specific time for each exposure. The second is designed for creating test strips with constant fractional step increments over a base time. On iPad (iPadOS 17 and later), DisparaTimer includes a landscape-only notes panel that lets you add photos or images of your test strips and make handwritten or visual annotations directly on them.

TimerGlass is the field companion for film photographers — reciprocity, pinhole geometry, exposure estimation, and a beautiful timer, all in one quietly designed app. WHAT IT DOES • Reciprocity failure correction for 100+ film stocks (Ilford, Kodak, Fuji, Foma, Rollei, ADOX, CineStill, Lomography and more) — built from manufacturer data sheets. • ND filter stack and bellows extension compensation are folded into the same calculation. • Pinhole camera tool — Lord Rayleigh's optimal aperture, effective f-number, equivalent angle of view by film format, and Sunny-16 exposure estimation that flows straight into the timer. • Long-exposure timer with Live Activity and Dynamic Island, accurate even when your phone is locked. • Long-exposure side-effects advice — pull-development guidance for B&W, color-shift tips for negative and slide film, contextual to your actual exposure time. • History of recent exposures with all the parameters you used. • Custom film stocks — define your own with power-law or lookup-table reciprocity curves. DESIGNED FOR Large-format and pinhole photographers who do long exposures often, 35mm and medium-format shooters chasing dusk and night scenes, and anyone tired of squinting at a film data sheet by torchlight. LANGUAGES English, 简体中文, 繁體中文, 日本語, Deutsch, Français. PRIVACY TimerGlass collects nothing. Everything you do stays on your device.