You should not have to keep the app up AND YOUR PHONE SCREEN ON for 10 hours a day in order for you to continue to show as Available during working hours. Who has the battery life for that? As soon as you put your phone down and click the screen dark, you go to Invisible or Unavailable or some nonsense. What good is that? Of course you’re not unavailable: as soon as you get pinged, you get a notification.