There are many apps on Google's Play Store that can be dangerous to use, which is why you should scrutinize the permissions that each app requires before installing it.
Some apps cross the line by installing malware on your smartphone that can compromise all of your personal data (including username and passwords you enter on your phone). A good example of this type of infiltration is through a simple flashlight app used by hundreds of millions of unsuspecting people.
Brightest Flashlight Free and Super-Bright LED Flashlight are just two of the many flashlight apps available on Google's Play Store that require too many permissions and installs malware.
If you'd like more proof, read the "FTC Approves Final Order Settling Charges Against Flashlight App Creator".
Requiring Unnecessary Permissions
What Flashlight App Do I Use?
It needs access to your camera because it uses it's flash bulb, nothing more.
There are other flashlight apps that you can use but be mindful of the permissions that they require.