Используйте приложение APKPure
Историческую версию Network speed indicator можно получить на Android
Отображение уведомления в строке состояния, указывающее скорость сети
This simple to use app gives you an indication of the current network speed by displaying a status bar notification.
An icon, always visible in the status bar, shows if there is no network activity, some network activity or more network activity for both outgoing and incoming network traffic.
The status bar notification shows the network speed in numbers or optionally as graph.
This app doesn't require any special permissions.
The graph needs to be purchased, but you can try it for free for one day.