Expose — Exposure Calculator

The exposure tool that thinks like a photographer. Dial in your exposure. See equivalents instantly. Calculate ND filters. Correct for film reciprocity failure across 17 film stocks. No guesswork, no wasted frames. Expose is a fast, focused calculator for film photographers, landscape shooters, and anyone who shoots manual. Three linked dials — shutter, aperture, ISO — give you equivalent exposures at a glance. No subscriptions. No ads. No account. Pay once, shoot forever. FEATURES - Linked exposure dials — change one value, the others adjust to maintain EV - Lock any dial to control which value compensates - ND filter calculator with stacking (ND2 through ND100000) - Film reciprocity correction for 17 stocks including Portra, Tri-X, HP5, Acros, Ektar, and Delta - Sunny 16 quick-reference chart for metering without a meter - Save up to 20 exposure presets for your common setups - Dark mode and light mode — readable in the field or the darkroom BUILT FOR PHOTOGRAPHERS WHO KNOW THEIR CRAFT - No tutorials. No onboarding. Launch and shoot. - No network connection required — works anywhere - No data collected. Zero permissions. Your tool, your privacy. - Under 2 MB — lighter than a lens cap