Opus is a simple augmented reality Android app (ARCore). It allows you to transform real-world objects into abstract mosaic-style 3D models in a matter of seconds. It's doesn't have advanced features, but it allows you to export the 3D model to .obj file with jpg texture file so you can import it to a 3D modeling software of your choice for further editing or use within Unity or Unreal Engine in your own apps or games.
The simple workflow process means that anyone can use it to create cool and immersive digital art easily and super fast. The app is free and I highly recommend checking it out. Just keep in mind that it's an ARCore app, which means that it requires an ARCore-enabled Android device.
I used my OnePlus 6 for it and the experience was second-to-none. I wish there were more advanced features. I hope that more people would use it so it will encourage its developer to add more cool features. It has a huge potential and I hope it will reach it.