These terms govern your use of the Spot Price app for Apple Watch, provided by Martin Huszti (Sealion), an independent developer (“I”, “me”). By downloading or using the App you agree to these terms. If you do not agree, please do not use the App. Capitalised words have the meaning given in section 1.
1. Definitions
- App: the Spot Price app for Apple Watch, including its Complication and any updates.
- Complication: the Spot Price element for watch faces, which shows prices the App has saved.
- Market: the electricity price area you select: Finland, Estonia, Latvia, Lithuania, or one of Sweden’s bidding areas SE1, SE2, SE3 or SE4.
- Spot Price: the day-ahead wholesale electricity price for a Market and delivery period, set the day before delivery and published around 13:00 Central European Time.
- Price Data: Spot Prices as published by a Data Provider.
- Data Provider: Volton Technology OÜ (“Volton”) for Finland, Estonia, Latvia and Lithuania, and Spotpris.nu for Sweden.
- Interval: the period each shown price covers: 15 minutes, 30 minutes or 1 hour, chosen in Settings. Longer Intervals show the average of the Spot Prices within them.
- VAT: value added tax at the rate set in the App. It defaults to the Market’s standard rate (Finland 25.5 %, Estonia 24 %, Latvia 21 %, Lithuania 21 %, Sweden 25 %) and you can change it.
- Margin: the amount in euro cents per kWh that you enter for your electricity company’s surcharge, including VAT.
- Displayed Price: the price the App shows: the Spot Price for the Interval plus VAT, plus your Margin.
2. The App
The App shows the Displayed Price for the current Interval, a chart of the next eight hours, the remaining prices for today and, once published, tomorrow’s prices, and a Complication for your watch face. It is free of charge and intended for personal use.
3. How prices are shown
- All prices are shown in euro cents per kilowatt-hour (¢/kWh) for every Market, including Sweden. The App does not convert to Swedish kronor.
- Times are shown in your Apple Watch’s time zone.
- The Displayed Price does not include network or transmission fees, electricity tax, monthly fees or any other charges, and does not reflect your contract terms. It is not your electricity bill.
- VAT rates in the App are fixed defaults that may become outdated if a country changes its rate. You are responsible for checking the VAT rate and Margin you set.
- Colours from green to red are a visual aid based on your colour Settings, not advice to use or avoid electricity at a given time.
The App is for information only and is not financial, energy or tax advice.
4. Price Data and attribution
The App gets Price Data from independent Data Providers that I do not control. Price Data may be delayed, incomplete or wrong, tomorrow’s prices may appear later than expected, and a Data Provider may change or stop its service at any time. Background updates depend on watchOS and may not happen exactly when scheduled. Before you make a decision that depends on a price, check it with your electricity company.
- Price Data for Finland, Estonia, Latvia and Lithuania: © Volton Technology OÜ (2026), licensed under CC BY 4.0, from public-data.volton.energy. The App changes this data: it converts euros per megawatt-hour to euro cents per kilowatt-hour, averages it over your Interval, and adds VAT and your Margin.
- Price Data for Sweden: from the public API of Spotpris.nu, used under its published terms.
The App is not affiliated with, endorsed by or sponsored by Nord Pool or the Data Providers.
5. Acceptable use
You may use the App for your own information. Do not use it in a way that breaks the law, misuses the Data Providers’ services, or redistributes Price Data in breach of its licence.
6. Availability and changes
I aim to keep the App working reliably, but I cannot guarantee that it will always be available or free of errors. I may change, add or remove features, Markets or Data Providers.
7. Intellectual property
The App, its design and content are owned by Martin Huszti (Sealion). Price Data remains subject to the rights and licences of the Data Providers.
8. Liability
The App is provided “as is” and “as available”, free of charge. To the extent permitted by law, I am not liable for indirect or consequential damages, loss of profits or savings, or damages resulting from inaccurate, delayed or missing prices, or from VAT rates or Margins that do not match your contract.
Nothing in these terms limits liability for intent or gross negligence, for injury to life, body or health, or any other liability that cannot be limited under applicable law. Your statutory rights as a consumer are not affected.
9. Privacy
The privacy policy explains what data the App processes.
10. App Store
These terms are between you and me, not Apple. Apple is not responsible for the App or its content and has no obligation to provide maintenance or support for it. Apple and its subsidiaries are third-party beneficiaries of these terms and may enforce them against you. Your use of the App must also comply with the App Store terms.
11. Changes to these terms
I may update these terms when the App or the law changes, and will change the “Last updated” date above. If you continue to use the App after a change takes effect, the updated terms apply.
12. Governing law
These terms are governed by Austrian law, excluding its conflict-of-law rules and the UN Convention on Contracts for the International Sale of Goods. If you are a consumer, you also keep the protection of the mandatory laws of your country of residence, and you may bring proceedings in the courts of the place where you live.
13. Contact
Questions and bug reports are welcome at seelowe.dev@protonmail.com.