Have yet to check this out but thought it looks neat. Anyone here heard of it or tried it out yet on your Android device? https://git.angry.im/PeterCxy/Shelter/
An other app similar like this, tho this one is from the author of Greenify, and Greenify can use Island to efficiently force apps to close https://forum.xda-developers.com/android/apps-games/closed-beta-test-incoming-companion-app-t3366295
