The memory alert stuff on iOS is similar; when the phone runs low on free memory it tells the app free up as much as possible, and then only starts killing proc

The memory alert stuff on iOS is similar; when the phone runs low on free memory it tells the app free up as much as possible, and then only starts killing processes if there still isn't enough available. It can be a bit finnicky to work with, but it does seem to be pretty much strictly better than just killing random processes without giving them a chance to be better behaved.