viaOTP: Exchange contact/business cards via 3 digit OTP

For a very long time I was thinking about an effective way to exchange contact information with others. I researched and I found that most of the apps, asks for phone's bluetooth/NFC/Location/microphone permissions. I was looking for a solution which could happen over simple internet connection and with minimal taps on user's phone. Then this idea came to my mind of enabling exchange using a 3 digit OTP. What does it ask from user? a simple internet connection, that is all. I worked on this solution for few months now and I just launched it. I had to do everything solely by myself. Thus I beg pardon if you found something not that up to the mark. Instead I will be happy if you can provide me with inputs and feedback so that I can keep improving this app. NOW WHY A WEB APP? Well obviously easier to develop, works on all mobile phones. Surprisingly for you it can also install on your phone (PWA). You can simply add it to your phone's home screen. Apologies! iPhone Safari browser users, due to strict policies Safari browser does not allow to download the exchanged contact VCF file. iPhone Chrome browser users, you are good to go with this web app.