For windows?
This is, in my opinion probably one of the best apps that has ever come to a phone. It is called cartoon hd, if there is a popular movie that you want to watch then you can watch it straight off here, or you can download it and watch it when you have no internet. Most of you probably already know about this but I just thought I would share it for the ones who didnt!
https://gappcenter.com/cartoon/