Mobile app (for Android)

Mobile app (for Android)

When does synchronization occur between the online version and the mobile app?  

I added a document earlier this morning online and it still is not appearing tonight on the mobile app.  I also completed a task online but it is still showing as overdue in the tasks on the mobile app.  However, it does show that I updated the project in my activity on the mobile app.

Is there someplace I need to go to manually synchronize?