Elen is a free Android app developed by Webbium AB that provides real-time information about the spot price of electricity in Sweden on the Nordic electricity exchange Nordpool in either SEK/MWh or öre/kWh. With Elen, you can also keep track of the current electricity production in Sweden from various sources, including hydropower, nuclear power, wind power, and thermal power.

This app is completely free to use, and you don't need to register your account to get access to its features. However, it's worth noting that the electricity price shown on the app doesn't include the supplier's fees, taxes, and VAT.

Overall, Elen is an excellent app for anyone who wants to stay informed about electricity prices in Sweden. It's easy to use and provides accurate and timely information.