Используйте приложение APKPure
Историческую версию CpuNotify можно получить на Android
Легкая загрузка процессора в панели уведомлений
Simple notification icon that shows CPU usage percentage. Refreshing every two seconds.
Done to be small and fast with few options in order to not to cause CPU usage itself!!
Know why and when your device is slowing down and what apps are causing you troubles!
Premissions:
Boot permission to be able to auto start after device reset.