Fotio
Fotio is a viewfinder-first light meter for shooting fully mechanical film cameras. Compose through your iPhone, dial in the ISO / shutter / aperture of your film body, and Fotio tells you whether that exposure is over, under, or on target — in real time, from the phone’s live metering. The phone is only a meter; your film camera’s dials stay virtual and never touch the hardware.
It runs entirely on your device: no accounts, no analytics, no network — your shots and custom cameras stay on your phone.
