Memo Filter is a comprehensive application for landscape photographers.Key features:- Creation of a filter base (neutral, polarizing, ND, GND, IR, etc ...)- Calculation of the exposure time of a photo- Recording of spots during shooting with the filters used for each of the photos- Find the timetables of civil, nautical and astronomical twilight, the "golden" and "blue" hours- Recording of the hours of sunshine of the places to visit- Theoretical information on filters and long exposure photography- Data hosting in a cloud- Ability to read data on multiple media (smartphone, tablet, computer)Features of the Premium version:- Without advertising- Annual subscription- Save unlimited locations- Change location- Advanced position search: by address, description, etc.