Picked and promoted by the App Store team as the “photographer’s must have”. It’s the best Spot Metering app in the world. Completely free.
Measure Color Temperature and Green/Magenta color cast. Balance multiple lights and apply correct filters so that you achieve perfect colors.
Get perfect exposure when using strobes. Works with HSS flashes. Control how much Ambient vs. Flash light falls to your subject. Flash duration will help you in freezing fast motion.
Know if you have enough light or if the light is spreaded equally over the surface. Measure in lux or foot candles. See how light output changes over time.
Set your ISO and FPS/Angle and quickly measure ƒ value. You can create your own ND filter stack and/or use Exposure compensation.