Permission Checker is an Android app developed by Opera Mobile Dev Team that allows you to inspect the permissions of all apps on your phone in detail. This app is especially useful because the current Android operating system only shows permissions in groups, while there are actually more permissions than what you might expect in one group. For example, the Phone permission group includes 9 permissions.

By using Permission Checker, you can improve your understanding of what apps really require from you. Malware may pretend to be useful, but they need more permissions to do bad things. Therefore, it's important to be more careful and use this app to understand the apps on your phone.

Overall, Permission Checker is a valuable tool for anyone concerned about the safety of their personal information on their Android device. Best of all, it's completely free to download and use.