No way I'm doing anything work related on any of my personal devices. I have a separate work phone. I turn it off at the end of the work day, and leave it at work.
I used to answer emails from bosses and managers while at home (at a previous employer), but it gets out of hand quickly and then they expect you to do it. Never again. Set boundaries immediately. At 15:00 I'm gone.
Leaving it at work goes one step further than my flow. I have AWP configured to automatically turn off at the end of the workday, so I become unavailable after that. There's always the possibility I can turn it back on after hours, but that extra step works well enough as a deterrent for me :)