PolarPro app icon on Apple iPhone screen. A photo and video tool to calculate which ND filter for a desired shutter speed. App now discontinued Stock Photo - Alamy
ND Filters and CPL Filters: Why, How, and When To Use Them - Moment
ND Filter Calculator App | Calculation of exposure
neutral density - Sony A7* ND filter app - Photography Stack Exchange
ND Filter Calc (DSLR) - Apps on Google Play
Sony Unveils Cool 'Digital Filter' App: An In-Camera Graduated ND Filter | PetaPixel
Long Exposure Calculator on the App Store
ND Filter Expert – Apps on Google Play
Long Exposure Calculator on the App Store
The Most Useful Free App for Drone Users | Fstoppers
NiSi Exposure Calculator App | NiSi Optics USA
LEE Releases Simple Exposure Guide App to Use with Their ND Filters | PetaPixel
LEE Stopper and ProGlass IRND filters: free exposure calculators by Jose Antunes - ProVideo Coalition
NiSi Filters Australia and New Zealand - We're super excited to launch our new NiSi Filters Australia iPhone App - ND exposure Calculator. It will take all the guess work out of
How To Shoot Long Exposures Without ND-Filters - Sony Smooth Reflectio
Sony's New Digital Filter App | Split Your Sensor/Scene Into 3 Areas & Control Exposure, WB, and More