Voltly
ReleasedKnow what the hour costs before you switch anything on.
The price of electricity changes every hour. Voltly puts the current price on your Lock Screen, tells you when the next cheap period starts, and shows what you actually used.
- Platforms
- iPhone · iPad · Apple Watch · Android
- Category
- Utilities
- Version
- 1.0.9
- Released
- 25 September 2026
Voltly at a glance
Voltly is an electricity price app for iPhone, iPad and Apple Watch from the Danish studio EU Studio. It shows the hourly price for your price area, when the next cheap period starts, and your own consumption and solar production.
- Developer
- EU Studio, Denmark
- Category
- Utilities
- Platforms
- iPhone, iPad, Apple Watch, Android
- Price
- Free, with in-app purchases
- Languages
- English, Danish, Swedish, Norwegian, German, French and Dutch
- Status
- Released · 25 September 2026 · Version 1.0.9
A closer look
Tap any screenshot to open it full screen.
What's inside
Everything Voltly does, without the filler.
The price as it lands on the bill
Not just the spot price: grid tariff, duty, system tariffs, your supplier's markup and VAT on top, colour-coded against the day's own prices.
Today and tomorrow
Every hour of the day in a chart you can drag your finger across. Tap into the day for hour-by-hour figures. Tomorrow's prices arrive when the market publishes them, around 13:00.
Cheap or expensive – compared to what
Colours follow the day's own prices, not a fixed threshold. 50 øre is cheap in February and expensive on a windy Sunday in July, and the app knows the difference.
Next cheap period
The whole cheap stretch — when power gets cheap and when it stops — with the average price across it.
What waiting is worth
Add your appliances, and the app finds the cheapest time to run them and says what it saves, priced across the whole run.
Widgets, Lock Screen and Watch
Price, cheap period and hourly-price widgets, a Live Activity on the Lock Screen, and the price on your Apple Watch.
Your consumption and solar
Connect with MitID to see your usage and solar export hour by hour, day by day — and with Premium, what it cost and what the sun earned.
Insight (Premium)
The year on one page — cost, average price, solar export and when you use the most — compared with the same month last year.
Five-day forecast (Premium)
Today and tomorrow from the market, the three days after as an estimate with a range — never a price to count on.
Seven languages, seven countries
Denmark (DK1 and DK2), Sweden (SE3 and SE4), South-West Norway (NO2), Germany, France, the Netherlands and Belgium, in Danish, English, Norwegian, Swedish, German, French or Dutch.
Why people use Voltly
The reasons that survive the second week.
Move the machine, not the mountain
Most of the saving is in waiting two hours. The app makes that decision take one glance.
Prices you can trace
The breakdown shows how the price is put together — spot, tariff and tax — instead of one number you have to trust. Sources and disclaimer, linked under the breakdown and in Settings, leads to the authorities' and data providers' own pages behind the prices – your own country first.
Your meter data stays yours
You sign in at Energinet with MitID — never in the app — and the authorisation grants read access to your own consumption, nothing else. It is fetched through EU Studio's own API, held encrypted, kept in the EU, and you can revoke it at eloverblik.dk whenever you like.
Frequently asked questions
Denmark (DK1 and DK2), Sweden (SE3 and SE4), South-West Norway (NO2), Germany, France, the Netherlands and Belgium, in Danish, English, Norwegian, Swedish, German, French or Dutch. The app picks the right area for you and lets you change it. On the App Store it is available in all seven countries.
What's next
Planned work, in no guaranteed order and with no promised dates.
- Shipped
App Store release
Version 1.0 is on the App Store, released 25 September 2026.
- Shipped
Version 1.0.1
A new front page, the whole cheap period, the forecast on the front page, new widgets and a comparison with the same month last year. Released 27 September 2026.
- Shipped
Version 1.0.2
Energy Coach (Premium) with a plan for today and tomorrow, possible savings per appliance and a monthly report, a solar forecast from Apple Weather, new alerts, and four new countries – Germany, France, the Netherlands and Belgium – with German, French and Dutch. Released 2 October 2026.
- Planned
More price areas
More Norwegian and Swedish price areas.
Version history
Version 1.0.9
- In Denmark, fetch your electricity usage with MitID right in the welcome guide. Your grid company is set automatically from your meter – and you can always skip it.
- Your insights now show which periods are being compared, with dates, and the comparison starts on the first measured day.
- Price alerts and «Appliances and routines» now have their own pages under More, so it's easy to set up routines for your savings and the monthly report.
- Norway and Sweden: the price areas NO1, NO3, NO4, NO5, SE1 and SE2 have been removed for now, because we don't have a source for their prices. NO2, SE3 and SE4 are still available.
Version 1.0.8
- Today’s plan and Tomorrow’s plan now show what each appliance costs from the grid – at the same price as the chart. The front page and Insight show the same plan for tomorrow.
- New page: Sources and disclaimer in Settings. It links to the authorities' and data providers' own pages behind the prices – your own country first.
- A link to the sources now sits wherever the price is explained: under the price breakdown, in See every hour and in Settings.
- The price footnote now matches your price area in Norway and Sweden.
Version 1.0.7
- Lock Screen: choose total price, spot price or sale price (solar). The current hour is highlighted, the widget shows the coming hours and follows the clock by itself, and the Live Activity stays until you stop it.
- Insights: the figures behind every percentage and the month that changed most. Last year is shown in green.
- The comparison uses whole months once a month has ended.
- Today's plan says what an appliance costs if you start it now.
- Solar: clearer about how sales are calculated and what to do if the solar meter is missing.
- Premium shows when it is shared through Family Sharing.
Version 1.0.6
- All price areas in Norway and Sweden: Eastern Norway (NO1), Central Norway (NO3), Northern Norway (NO4), Western Norway (NO5), Northern Sweden (SE1) and North-Central Sweden (SE2) have been added.
- Local taxes: no VAT in Northern Norway, no electricity tax in Finnmark and Nord-Troms, and reduced energy tax in northern Sweden.
Version 1.0.5
- Lock screen: the Live Activity shows the next 12 hours of prices with a marker for now, and the lock-screen widget fetches prices itself and updates every quarter of an hour.
- Your solar agreement (Denmark): choose who you sell power to, and sales are calculated with the buyer’s fee and tariffs.
- Solar panels with several arrays, e.g. east and west.
- Tap the address card under More to see your agreements.
- The price now and the hourly chart show the same quarter, and the price stays full size with large text.
- Premium can be shared with your family via Family Sharing.
- Front page: the forecast now sits above Today’s plan, and the Energy profile clearly says when it still needs setting up.
Version 1.0.3
- Your appliances and routines now live in your Energy profile, together with goals, solar panels and home battery.
- Today’s plan shows what can still be done today. Once today’s cheap hours are over, the appliance moves to Tomorrow’s plan, calculated on tomorrow’s prices.
- The Premium screen lists everything that’s included.
- Fixes and improvements.
Version 1.0.2
- Energy Coach (Premium): the most useful advice right now and a plan for today and tomorrow – EV, laundry, home battery and solar.
- Your savings: possible savings per appliance and a monthly report.
- Solar forecast from Apple Weather for solar panels and home battery.
- New alerts: when the price gets high, and when power stays cheap for several hours.
- Grid tariffs now follow summer and winter rates automatically.
- The consumption chart shows dates on the comparison.
- New countries: Germany, France, the Netherlands and Belgium – and the app now speaks German, French and Dutch too.
Version 1.0.1
- New front page: hourly prices sit right below the cheap period, and the hour you are in lights up.
- Next cheap period shows the whole cheap stretch — when power gets cheap, and when it stops.
- The five-day forecast has moved to the front page — tap a day to see its prices hour by hour.
- Compare your usage with the same month last year in Insight and Consumption.
- New widgets: Cheap period and Hourly prices. The Electricity price widget has a new look.
- Insight shows what you get when you fetch your power usage.
- Better with large text: the whole day's chart fits on the front page without scrolling.
- Fixed: the app could forget your electricity meter after being in the background.
Version 1.0
- First release on the App Store.
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Get Voltly
Know what the hour costs before you switch anything on.