Gasflow shows the current bandwidth usage in the status bar, not as an overlay like DataStats, which I like more. So it is like the non free app Internet Speed Meter Lite.
Gasflow – Open Source Speedmeter for the Statusbar on Android

Verkehrswende, Fahrrad, CriticalMass, OpenBikeSensor, SimRa, Mumble, Open Source, Minimalist, OpenStreetMap, Müllsammeln
Gasflow shows the current bandwidth usage in the status bar, not as an overlay like DataStats, which I like more. So it is like the non free app Internet Speed Meter Lite.