View Navigation Satellites on Android and iOS

There are now several satellite groups hanging from navigation aids in the endless sky. Of course there is the old American GPS, and for quite some time now the Russians are also participating with their Glonass. The EU is steadily progressing with the completion of Galileo and China has its Beidou. Even Japan has launched its own set of navigation satellites, but for the time being they are mainly interesting for their own region. Under both Android and iOS you can check which satellites are used for positioning!