Israeli startup GearEye uses a radio frequency ID (RFID) scanner, tags, and an app to locate your important belongings.  GearEye sought to raise $60,000 on Kickstarter.  It ended up with over $500,000.

http://nocamels.com/2016/12/geareye-rfid-locator-app/  https://www.youtube.com/watch?v=1MlCZF3TFHQ

https://www.kickstarter.com/projects/874608327/geareye-the-ultimate-gear-management-system