This existed, although I believe they shut down after a year or so: https://techcrunch.com/2016/09/27/pearls-rearvision-is-a-backup-camera-for-those-who-want-t

This existed, although I believe they shut down after a year or so: https://techcrunch.com/2016/09/27/pearls-rearvision-is-a-backup-camera-for-those-who-want-the-best-rear-view/ https://techcrunch.com/2016/09/27/pearls-rearvision-is-a-bac...