I built exactly this in 2016. I realised that Bluetooth requirement from both parties is too much friction.
It worked way better with a QR code.
That way there is proof of presence and the recieving person need not have the app installed.
It worked way better with a QR code.
That way there is proof of presence and the recieving person need not have the app installed.
Apple added "knocking", which they called called NameDrop, a few years ago. You bang two phones together and the simultaneous acceleration tells them to talk over NFC. But apparently Apple has gradually been locking down that feature because it's used to help organize protests.[2] Can't have that.
[1] https://www.oreilly.com/library/view/palmpilot-the-ultimate/...
[2] https://www.msn.com/en-us/technology/software/apple-wants-to...
I attend a lot of events, and most of the time, I just quickly whip out my phone and scan the QR code (which is usually on a lanyard around their neck).
We can both acknowledge the action taking place (which I believe is important for spam prevention / security / politeness), follow up later, and it takes 1/2 seconds. With this, I would be walking around wondering if the connection was saved or not and checking my phone, which is about the same time cost as just scanning the QR code.
The business card exchange or QR code scan exchange, I think, is important to create a legitimate link. I hate it when I go to events and people scan my QR code from a distance to hit me with cold calls and spam later (usually flip it the other way while not interacting with potential clients), which is sort of how this idea sounds, but weighted towards the spammers side.