I think you could restyle the infinitepassengers.com/u page and add it into the app with live Departure and Arrival boards.
They would be able to set a flight number and route before each flight with the destination . They would then appear on the departure board until gear up and climbing. They would appear in the arrival board when approach the airport. This could be added in the home screen of the app selection under “Departures/Arrivals”.
It would shows these for all airborne flights within IF PAX. These could also be airport specific.
Status could be:
Boarding - once you have loaded IF
Pushing - when pushing back
Departure - When Airborne
Approach - When approaching airport below 10K
Landed - slow to 35 kts
Gate numbers could be input by the pilot or auto from IF spawn.