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Streetpass for phones
I think streetpass used wifi, but this seems to have the same UX to it.
Interesting from a technical point of view. But the real problem to solve here is buried in this throwaway at the end, and it even suggests that this is entirely the wrong tech for the job:

> So the way I see auraphone working at an event, you walk around and mingle as normal but yeah every one has their phone out and running the app but ONLY this app. You are still present and in the conversation not just looking at other distractions from your phone.

What is so magic about this app that it will make your phone not be a distraction? And how do you get everyone to download a new app? And if you can get them to do that, why not just exchange the info through a normal server? Then you could literally just tell the app which event you’re at (and sure, use Bluetooth for that, but a QR code or even just a link would probably work better) and then they don’t need to walk around with the app open.

To properly make this work you need to download the app, enter a bunch of information, go to settings to disable sleep mode, not touch your phone and also not have it accidentally swipe away from the app.

Seems like the (only?) target audience for this would hardcode networkers going to network events. And honestly, I think people who go to a event like this don't have this problem of missing a connection they wanted.

Not sure if this intentional, but the app is listed in the App Store for iPhone under the Food & Drink category.
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.

I really don't understand this. I've got to fiddle with my phone, and use this app? And presumably the other person also needs this app? This would never work at any trade shows I've been to. QR codes work better for this thing (sharing details quickly with least friction)
Bad actors in the mobile space have ruined so many potential good uses of smartphones due to the restrictions that have had to be put into place.

Do I want random f2p mobile games broadcasting my personal info 24/7 as a never killable background process? No. But sometimes I do want 24/7 stuff running!

OP's app is a great example. Technically doable but not allowed because of how locked down mobile phones are.

LinkedIn used to have this feature called Find Nearby. It allowed you to connect with people near you and it worked really well during large events. It used Bluetooth too.

They removed it some time in 2021 or 2022 unfortunately.

Your idea is nice, but it’d easier if tighter integrated somehow with another platform.

any idea why linkedin removed this? I'm hoping it was because it was just too buggy and my code is amazing hehe?
I genuinely applaud your insufficient workarounds for legitimate security protections and I say this as respectfully as possible: This is an extremely dumb use case and I can't imagine anyone would want it.
Hey, that's a pretty cool concept!

I work on developing technology to solve sales and real-estate problems and streamlining/populating connections with people is a big issue. Exporting these to an excel sheet/csv is something that sales folk would absolutely kill for to make things easier to manage.

However, the hurdle to have enough get the application and have it running on both parties' systems while at the event is certainly a pretty strong bottleneck.