Useless. Avoid.
There are countless apps that allow you easily to create a QR version of a vCard to share your contact info. I have been testing quite a few. Don’t waste your time here. (1) This app only supports a single card (ie set of contact info): so you can set up, for instance a business one and a personal one. (2) There is no support for social media profiles. Just a single website. (3) The phone number field doesn’t support international numbers. (4) After entering your data, the app will force you to enable location services. Why this is necessary is unclear but it’s a privacy problem. (5) Even then, the app cranks and cranks, apparently doing “something” but it never creates a QR code. It’s all a bit suspect.