You're a coturnix- / quail breeder? So you have a incubation machine. This app calculated the incubation time of your quail eggs. If you want, it stores your ToDo´s and the parameters of the incubation process to your calendar on your android device.
So you will never forget to set correct temperature, turning off the egg turning, check water levels and so on.
This app is for free. It needs permission to access to your calendar and to the internet.
Select the day on calendar, if incubation start isn´t today.. Then go to menu and click "Save events and jobs into calendar". That´s all.