I did some test driving with the
"EcoDrive Free Speedometer". It looks like that:
It uses the GPS antenna of the phone and there is a little ECO score in the middle of the screen.
It's very sensitive, but works fine. Not much settings available, no ECO driving notifications or warnings available, but you can set an alarm when going over a certain speed:
Language: english
Last update: 2016
Cost: for free, financed by ads
Permissions: GPS and storage
Link:
https://play.google.com/store/apps/d...w.ecodrivefree