AR, augmented reality cubes, Restore project

There is a product: cubes with augmented reality, Android, IOS.
I provide the source files from 2014. OpenCV library.

I am looking for a specialist to resume the product's work on a modern stack. 
The work is considered accepted after publication in the markets.

Please write your experience, price, deadlines. You can build it on another stack (if it works reliably. Which I am not sure about. Previously, we looked for a frame, and then OpenCV recognized the image in the frame). It is clear that it can be easily built on Unity + Vuforia or, if you have experience, on  AR Foundation (Unity) + ARKit + ARCore

If your option suits, the range and amount and deadlines - I will have you sign an electronic NDA and provide the source files for review.

Here is the video:
https://www.youtube.com/watch?v=mq49oePu0EM

Here is the application:
https://apps.apple.com/us/app/abc-talk-with-me-english/id1061646469

Here are the cubes for testing:
https://docs.incust.com/index.php/s/JbHjBwpK6Z6LJ53/preview