Essential

Speedtest is an absolutely essential app for everyone. Why? You can check the speed of your internet connection. This is really helpful to figure out if it is faster for instance to upload a photo over wifi or 4G. You can also check periodically what your speeds are like on your 3G or 4G network to see if you need to switch to a different carrier. You can also check the speed of your internet while using a VPN. You can check if your connection is just slow or something isnt actually working correctly. You get the idea...

Luke J J about Speedtest by Ookla, v3.7.1