Do you have breakfast with your partner? Egg-timer x2 is what you need.
This app provides two separate timers with individual cooking time and different alarms. The layout supports portrait and landscape mode. The app deactivates the display going idle, so you can permanently see the timer and you don’t miss any alarm.
Timer settings are stored locally on your device and will be used next time you start the app. There’s no need to setup the timer again and again.