The highlighter and card library. The highlighter is useful, because you can highlight or annotate anything on the web just by highlighting select texts in whatever you're reading and then using the browser extension to save the highlighted text in the color of your choosing and adding it to your card library within the app website on your channel. But that is also the most bugged and glitched feature. Review collected by and hosted on G2.com.

Sometimes it's buggy, honestly it's frequently buggy and glitchy. Review collected by and hosted on G2.com.