I’m on the Octopus Agile electricity tariff, where the price changes every half hour based on wholesale costs. This is great for saving money and using less carbon intensive energy, provided you can shift your heavy usage to cheaper times. With a family that insists on eating at a normal hour, that mostly means scheduling the dishwasher and washing machine.
The snag was not having an easy way to see upcoming prices on my Linux laptop. To scratch that itch, I built a small GTK app: Octopus Agile Energy. You can use it yourself if you’re in the UK and have this electricity tarriff. Either install it directly from Flathub or download the source code and ‘press play’ in GNOME Builder. The app is heavily inspired by the excellent Octopus Compare for mobile but I stripped the concept back to a single job: what’s the price now and for the next 24 hours? This felt right for a simple desktop utility and was achievable with a bit of JSON parsing and some hand waving.