This video will tell you about dangerous permissions in android.
Permissions that access data or resources which includes user’s personal information are dangerous permissions. This can affect the app operation and user’s stored data.
For example ability to read user’s contacts comes under dangerous permission.
App Permissions Viewer (View & Manage Permissions)
https://play.google.com/store/apps/de...
Bouncer (Manage & Schedule Permissions)
https://play.google.com/store/apps/de...
More Info About Android Permissions.
https://www.onetouchapplabs.com/blog/...