Speedtest calculates download speed by transferring a sample file from the server to your computer, which assesses how quickly your connection can draw data from the server to you — effectively, your streaming or download speed. It then sends the file back to the server to determine the upload speed, which is the rate at which your connection may send data from you to others, such as for video calling or file sharing.
Ookla, which is utilised by ISPs, governments, and businesses all around the world, powers Speedtest. Speedtest's strong product portfolio now includes desktop programmes in addition to Speedtest.net and apps for iOS, Android, Apple TV, and Google Chrome, with more platforms scheduled to join in 2017.
