No, it's entirely optional. Since a growing number of smartphone apps and operating systems now support QR Codes, NFC Tags, and Physical Web Beacons (see links below), Phy works right "out of the box."
- How do people see content through my QR Codes?
- How do people see content through my NFC Tags?
- How do people see content through my Physical Web Beacons?
But if you do have a mobile app, our SDK unlocks a whole new world of engaging user experiences (transformative browsing UI, alternate content routing, conditional content routing, content security filter, and a customizable UI) across codes, tags, and beacons.
Visit our Developer Resources for more about our SDK.