AngularJS and Flask are both open source tools . It seems that AngularJS with 59.6K GitHub stars and 28.9K forks on GitHub has more adoption than Flask with 44.8K GitHub stars and 12.6K GitHub forks.
Read moreIs Angular and Django same?
Angular is a javascript based MVC frontend framework while Django is a Python based MTV backend framework . Angular can independently be used as a framework if you are not using any REST calls or not getting data from the server, this is usually never done as it defeats the purpose of SPAs.
Read more