Sometimes it helps to close and re-open the app to reset things.  This is called "killing the app" - but it's very easy (and not at all dangerous)!

  1. Double click on the round home button on your iPhone
  2. Navigate to the GOFAR app and swipe it up.

After doing this you will typically want to reopen GOFAR.

If you want you can see a short video on closing apps on an iPhone 6 (running iOS10)

The home button on an iPhone is the round one at the bottom of the phone screen.