Fotio: Film Exposure Meter

Fotio turns your iPhone into a precise light meter for fully mechanical and manual film cameras. Point it at your scene, read the exposure, and dial in ISO, shutter, and aperture against a live viewfinder. Lock any settings you want to keep fixed and Fotio auto-compensates the rest to keep your exposure on target.

FEATURES • Viewfinder-first metering — the whole screen is your scene • Center-weighted metering by default, with tap-to-spot and long-press to reset • Full exposure-triangle control: ISO, shutter speed, aperture • Lock any dial and the others auto-compensate to hold correct exposure • Real APEX exposure math with a live EV-offset readout • Camera presets — each camera carries its own array of stops • Capture log — save your chosen settings with a framed reference, kept in a private in-app gallery (your photo library stays untouched) • Color / B&W preview

Everything stays on your device — captures live in Fotio's own gallery, nothing is uploaded and nothing lands in your Photos.