there is already one:

  
      play.google.com 5
  
  
    Discourse

Discourse is the 100% open source discussion platform built for the next decade of the Internet. It works as:

- a mailing list
- a discussion forum
- a long-form chat room

The application provides:

- Real time push notifications for officially hosted Discourse forums
- At a glance tell how many unread/new topics your forums have by looking at the app icon 
- A central spot to view all notifications, unread counts and new counts
- Uses Google Chrome as the website browser, no need to log in ag...
Free

  
  
    
    
  
  



  
      App Store
  
  
    

‎Discourse Hub 10

‎Discourse is the 100% open source discussion platform built for the next decade of the Internet. It works as:

- a mailing list
- a discussion forum
- a long-form chat room

The application provides:

- Real time push notifications *
- At a glance...