Get the package info app
Complete info for packages and hardware
What problem does it solves?
What is unique about the app?
Why should you download the app?
What are the best features?
Where’s the challenge?
To unlock full potential of your device, you should carefully consider rooting your device. If you are careful the advantage of rooting is much high than its side effects. There are lots of help available on Internet to safely root your phone
System applications are signed with system keys, so the best way to list system app is to select on system app (e.g. Android System) and double click on it. Now click on “Show list” button Similarly you can list all apps signed by Google / OEMs keys by selecting one of their app and click “Show list” button
How my app get system permission
Permission Protection Levels can be one of four following values:
The default value for a permission
Indicates that this permission has the ability to access some potentially sensitive information or perform actions on the device
Indicates that this permission can only be granted to another application that was signed with the same certificate as the application that defined the permission
This is the same as the signature protection level, except that the permission can also be requested by an application that came with the Android system image