Opensignal is a free to use, advert free mobile connectivity and network signal speed test app. Speed test for mobile and Wifi internet Opensignal speed tests measure your mobile connectivity and signal strength. Opensignal runs a 5 second download test, 5 second upload test and a ping test to provide a consistently accurate measurement of the internet speed you will likely experience. The speed test runs on common internet CDN servers. The internet speed result is calculated with the middle ra