To potentially increase conversions, you could make me first write a message, then ask me to sign up and perhaps invite a friend that could discover that message. If I spent time and I'm happy about that message, I'd more likely go through the signup process.

Congrats, this works really well! The placement of the AR content is really quite robust and snappy.

Technical question: What are you using for scene recognition/localization? Any particular image features? Any off-the-shelf libraries?

So you would essentially be walking around with an AR compatible device and be able to discover messages left by your friends? This is actually a really great concept if i'm understanding this correctly

That's right.

Love the idea, I think you guys are on to something that might not be that big of a hit now, but once the general public starts to enter into this space you'll be in a great position!

Very cool; having fun with this, made my wife's day :)

What libaries did you use? And security? Not sure if you are looking to make money with it or just as showcase: if the latter why would you need login? Just exchange pub keys (can be sent by link in mail which the app picks up) and you really have something cool :)

We need login to let people interact each other, it's not just a drawing app, it's a social-drawing app :)

This is basically the messaging system from Dark Souls in real life, right?

Very cool.

First screen after the intro was a log-in screen, deleted immediately

I'm not sure how you expect to be able to leave or receive private messages in public places if they know who you are.