It's an Android APK that allows you to watch anime on your device. There are hundreds of cartoons to choose from. In addition to the most famous anime, there are lots of OVA series.
Is WatchCartoonOnline website legal?
Is It Legal To Use WatchCartoonOnline? Despite the ban imposed on such sites, these sites operate with full force on the web. WatchCartoonOnline site is not legal at all. If anyone caught watching movies and shows on this site, he or she would be held for the crime.