IOS 7 is the best OS for smartphones and tablets. I like new iOS 7 and wait official iOS 7.1 jailbreak tool Evasi0n because one cydia tweak can silently installs itself to the my new iPhone’s system and listens for any app to make a request to access your contacts on your iPhone or iPad. All mobile devices owners know, that a lots of apps, who you can install on your idevices, make request to access your contacts. Do you know this? After official iOs 7.1 jailbreak you can install cool tweak and each time an app does so, a system popup will be displayed and allowing you to approve or revoke access.

Cydia Tweak "ContactPrivacy" will not install an icon, it will only display something if it notices an app requesting your contacts.

To install the tweak, you obviously need a jailbreak iOS 7.1. Why only after jailbreak iOS 7.1?