The classic Sunny 16 rule, beautifully reimagined for iPhone and Apple Watch.
Select your lighting condition, ISO, aperture, and shutter speed. The viewfinder-style meter shows exposure deviation instantly.
From bright snow to moonlight. Covers every scenario from EV 16 down to EV -6.
Use your iPhone camera to measure ambient light with real-time EV readings.
Full calculator on your wrist. Quick access with Digital Crown. Perfect for street photography.
No internet required. Your exposure calculator works anywhere, anytime.
Unlock full access once. No subscriptions. Works on both iPhone and Apple Watch.