The trajectory subapp computes trajectory data such as apogee for your rockets. There are currently 465 motors in the database.

When you open the trajectory subapp, you see the simulation results screen. It will be empty, because there is no rocket and motor selected. In the top right corner, there is a button to enable/disable GPS. Tap the „choose rocket“ button to select a rocket. You will see the same selection screen as in the rockets subapp. Tap a rocket to select it.