Sun Tracker AR
Apart from the Lux software to monitor the system I have been using the following to track where the sun with rise and fall compared to my panels. Sun Tracker AR shows not only the sunrise and sunset. It also shows the height in the sky
This app is also very helpful when researching your solar install per purchase. You can use it to work out which roofs are most optimal for the panels
This is an old Apple Map image. The block dot to the right of the pin is our old single panel. The is where the four south east panels are. The roof to the left of those four is where the four north east panels are installed
The roof to the left of the pin is where the six north west panels are installed