Suggestions for Challengedac app

These are the few suggestions I have for the app.
more like feed back too.

include email registration and email log in.
link other social media so friends can meet and discuss with their friends on other platforms like twitter and Facebook.
When a new challenge is up, there should be pop ups for notification which will create a thirst for engagement.
user friendly, I just want to see challenges from my friends but not from people I'm not following or are not my friends.
the dashboard should be easy to access and the content on the menu should have a few for trading the tokens efficiently
daily activities like a contest should be given which will always make you want to come back for more.

I guess that should help out.
I will still review other things aside the app and give you feedback on them.