@JordiBlanch and I built this Flutter application using the ARCore library for Android. Users could register and log in, and their data was stored in MariaDB through an API we developed in .NET.

Once registered and logged in, the user was automatically added to the general ranking and could join the AR game: using the smartphone, and in certain festival locations, the main objective was to find all the pieces of a puzzle. Those pieces were spread across seven different locations and appeared randomly, cycling through each spot over time, so completing the puzzle was harder than it first looked.

When a user entered the proximity radius of a piece, the phone vibrated and the user could open the camera screen, spot the randomly placed piece, tap it, and earn points.

We had around 20 users that day and it was a lot of fun. As a beginner project, it was a great experience and it felt really good to pull off all the key ideas we had planned from the start. We were very proud of it, and we still are.

You can watch a short test demo here.

And this is just a screenshot of the registration screen, because why not.