Tchou-Tchou

An application for macOS (10.12+) that just displays the speed of the TGV you are travelling with, in your menu bar.

How to use?

Download the latest binary release (submission to Mac App Store in progress)
Drag and drop Tchou-tchou.app to the /Applications folder
Run Tchou-tchou.app
Forget about it. The app is running (slowly) in background and will display the speed of your TGV when connected to the WiFi.
(Optional) Add the Tchou-tchou.app to the list of applications opening automatically at login in System Preferences → User and Groups → Login Items