Typically you will setup a Standup in an automatic recurring schedule. If you need to setup a Standup that you will run when you need manually, then you have to pick manual schedule.
The setup is similar to creating any recurring Standup, only in the schedule configuration you pick "manual" instead of "recurring".
Navigate to Troopr home tab where you can see the list of all your Check-ins. Choose the Standup, Click on "Other actions" ⇒ "Run Now" to run the Standup
Reporting behaviour will be similar to any scheduled Standups.