Netflix is nice platform that most people in the world use to check there internet speed. Though Nexflix is an app well known for movies and TV show watching but the have gone beyond that by luching an internet speed testing app that allow you test your internet speed, Nexflix also opened a website (fast.com) where you can equaly test your internet speed.
This screenshot is the result i got from my mobile speed and did that by visiting the site fast.com
Mobile speed test from fast.com
How Do The App Works