App (Win/Android) for managing and cataloging Lego sets
Brickset allows you to do all of the things you mentioned. It's very simple to use, but it also has some optional advanced features. You can read more about keeping track of your collection on Brickset here: https://brickset.com/mycollection

There are some Brickset based apps providing options for Android and Windows 8+, although I'm not familiar enough with them to be able to recommend one that would work for you.