"Crew Rest" is intended for Crews around the world who need to divide a specific amount of time in different rest / work periods.
Use of ETA vs TOD (Time of Descent):
The time period between "rest start" and "Descent time" is what this program considers available for rest/service calculations, but you can put in anything you like in the "Descent" field, like ETA etc... The App will simply use the time range you give it...
It is designed more specifically for Airline operations, and for both Cockpit and Cabin crews.
But any other type of working crew can use it…
For anyone reading this with no knowledge of airline operations, don't worry, crew rests are normal, scheduled and only take place on long haul flights in order to ensure a perfect level of alertness upon arrival! NOBODY is asleep at the controls! !
Fellow crewmembers enjoy and treasure that sacred rest!