Please check the following video: Clean Master's Ugly Battery Saver
https://www.youtube.com/watch?v=E9W6paXy3mw
Depended on its “Battery Saver” Mode, Clean Master can easily hack users’ accessibility on their smartphones. This means Clean Master can observe your actions and retrieve window contents. While users aim to optimize their smartphones with low power mode, the accessibility feature is being activated as well. Clean Master is able to force stop applications which are not on the whitelist. This indicates that users will no longer receive any push notification from blocked applications unless they activate them manually within launcher. Meanwhile, users may miss important push notifications from those misbehaving applications.
https://www.youtube.com/watch?v=E9W6paXy3mw
Depended on its “Battery Saver” Mode, Clean Master can easily hack users’ accessibility on their smartphones. This means Clean Master can observe your actions and retrieve window contents. While users aim to optimize their smartphones with low power mode, the accessibility feature is being activated as well. Clean Master is able to force stop applications which are not on the whitelist. This indicates that users will no longer receive any push notification from blocked applications unless they activate them manually within launcher. Meanwhile, users may miss important push notifications from those misbehaving applications.