EPWatch

App displaying the current electricity price,
with widgets for Apple Watch, iPhone and iPad.

EPWatch is an open source app that allows you to see the current electricity price on your Apple Watch, iPhone and iPad.
I created this app mainly for the Apple Watch, as I wanted such an app for myself and couldn't find one at the time. I added iPhone/iPad support because it was easy and I wanted try out the new iOS 16 lock screen widgets.

Download

EPWatch is available on the App Store.

Supported countries

The app uses the Day-ahead Prices from the ENTSO-E Transparency Platform and supports all countries/areas available in the API, which are:

Austria
Belgium
Bulgaria
Croatia
Czech Republic
Denmark
Estonia
Finland
France
Germany
Greece
Hungary
Ireland
Italy
Latvia
Lithuania
Luxembourg
Netherlands
Norway
Poland
Portugal
Romania
Serbia
Slovakia
Slovenia
Spain
Sweden
Switzerland
Ukraine

Some countries (available in the API) don't seem to have data, which currently are disabled in the app:

Albania
Bosnia and Herzegovina
Cyprus
Georgia
Kosovo
Malta
Moldova
Montenegro
North Macedonia
Turkey
United Kingdom

Build

Obtain an API token from https://transparency.entsoe.eu/ (you need to create an account, but it's free).
Hit Build & Run

Resources

I found this reddit answer very helpful when I got started. I still don't understand the entsoe documentation on how to construct the in_Domain/out_Domain values of the query (If there's a better way than manually copying the codes!?) :)
Transparency Platform RESTful API - user guide

Issues