This is the BETA version and hence has only 400 Icons for now. Make sure to rate about it's quality and not the number of icons. This pack needs your support.
There is an in-app option to Donate few bucks if you feel like this pack and also wants to support it's development.
There is also a Google+ community, where you can track progress of this pack.
Your ratings and review are very important. Make sure to leave them.
Thank you for the support! :)
Google+ Link : https://plus.google.com/u/0/communities/115944951853513769530