According to the app’s description, “Use the fast.com application to help you see how fast your internet connection is, whether on mobile or broadband, anywhere in the world. It is ad free with a streamlined design that is quick and easy to understand.” Basically it sounds like the web version except that it was for smartphones.
Now it has been suggested that out of the speed tests out there, Fast is said to be the more accurate of the bunch. This is because ISPs are already familiar with other speed testing tools and can optimize their networks to make themselves look good on them, this is why if you’ve used other tools, you’ll be seeing numbers you’re definitely not getting.
Whether or not you agree with that is up to you, but either way for those who are interested in a mobile internet speed testing tool, hit up the iTunes App Store or Google Play for the download.