Google announces its augmented reality project, Tango, going to shutdown on March 1, 2018. Tango is the Google’s first big AR push. The tech giant launches tango in 2014. It solves the issue of position tracking with lots of extra hardware.
https://spinonews.com/2017/12/16/rip-google-tango-the-tech-giant-first-ar-project-going-to-shutdown/