Stay is my favorite app to automatically rearrange windows on my Mac.
For work and home, I use laptops. My work setup is connecting a MacBook Pro 16” to two 27” LG UltraFine 5K monitors.
Every open app window is intentionally sized and arranged across that screen real estate. During the workday, I regularly connect and disconnect from these monitors. Even using Moom with keyboard shortcuts to quickly size and move windows, I don’t have time to constantly rearrange 15 app windows when I’m switching from external monitors to laptop.
This is where Stay saves me time. It remembers my window layout for every monitor and laptop configuration. When I unplug the monitors, windows automatically rearrange to the laptop-only layout. When I plug back into the monitors, I’m back to work in a couple of seconds.
I can’t recommend this app enough. My Macs are broken without it.