Tempo is a regulated EDF electricity tariff in France. Every day is blue, white or red, and the kWh price varies roughly fivefold between a blue off-peak hour and a red peak one. This plugin shows today's and tomorrow's colour with both of its rates, the red and white days left in the season, and the last 30 days. France only, and the screen is in French. No account and no API key: there is nothing to configure.