Hacker News Reader

Can I use this on my private repo or it's just for open source stuff???

Yep you can use on your private repo as well.

Just install the extension, go to your repo and open the Metamorph extension on the sidebar.

Just to add to the above answer, you will have to add your "Personal Access Token" to the extension so that it can get access to the analytics data.

The token itself is stored in your browser's localstorage, btw.