A free app for Android, by Stefano Siano.
Permission Ruler is a powerful and easy-to-use app for managing app permissions. If you want your apps to avoid utilizing potentially harmful permissions when your screen is turned off or if you ever wondered if an app can have unauthorized access to you through your microphone, then the Permission Ruler, robust and automatic permission management, is what you need! Permission Ruler will automatically remove all rights from all your apps whenever your screen shuts off, so you can rest and not worry about your privacy or squandering your battery. With permission Ruler, you'll have more privacy and battery longevity, as well as an easy-to-use UI for managing permissions manually.
