One of the popular and successful application of Augmented Reality is barcode/QR-code scanning. A lot of apps can read and generate codes. But few can read the real stuff. That’s what Google Goggles is for.
The privacy shield is not only for privacy concerns. You can also enable non-globally available Google Play Location Reporting & Reporting by XPrivacy.
Google Calendar is one of the foundation functions of Google schedule management. Recently a new version of Google Calendar Android app is released in response of Material Design. Has it become better or worse? Have a look.