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 Filter Calc (DSLR) - Apps on Google Play
Neutral Density Calculator by Nitrio
If you Shoot Long Exposures, You Gotta Get This App - Scott Kelby's Photoshop Insider
LExp / Long Exposure Calculators for iPhone and iPad | Fine Art Landscape and Travel Photography by Ilya Genkin
Lee Stopper Exposure Calculator Review
Useful tools: Photography apps for iPhone - Pixelfriedhof
Long Exposure Calculator by Junel Corales
Exposure Lesson #8: How To Use Bulb Mode Successfully
LEE Releases Simple Exposure Guide App to Use with Their ND Filters | PetaPixel
Top 10 Apps for Photographers – 2016
ND Filter Expert for Android - APK Download
Calculating exposure times using the NiSi Filters app - NiSi Optics USA
Untitled Apps -
Exposure Calculator
LExp / Long Exposure Calculators for iPhone and iPad | Fine Art Landscape and Travel Photography by Ilya Genkin
LEE Stopper and ProGlass IRND filters: free exposure calculators by Jose Antunes - ProVideo Coalition