You can use it anytime, anywhere, without secondary charges. The secondary app has the following features and functions:
***Beautiful interface and simple operation***
***Quick identification of QR code***
***Extensive editing operation for QR code***
***Store the records you use for easy viewing***
【Privacy Agreement】
https://docs.qq.com/doc/DQUV3ak5Rb0podmRk
【EULA】
https://www.apple.com/legal/internet-services/itunes/dev/stdeula