Will electricity be cheaper tomorrow?VoltCast: Power Price Outlook for iPhone
VoltCast is an iPhone app for anyone on a dynamic or spot-price electricity contract. It shows today's and tomorrow's hourly spot prices, points out the cheapest hours to charge an EV, run a heat pump or top up a home battery, and gives you an outlook for the rest of the week – so you can plan your electricity use before the day starts.
For iPhone · 30+ European price zones, Great Britain, the US, Australia and more
Start with your next charge
EV charging with a dynamic tariff · Strompreis-App für dein E-Auto. Check sources and price limitations before comparing prices with your bill.
Today's and tomorrow's prices at a glance
Open the app and you see the spot price right now, today's average and whether tomorrow looks cheaper or pricier than today. As soon as the next day's prices are published, VoltCast switches to the confirmed hourly prices, so you are not refreshing a website every afternoon to find out what tomorrow will cost.
The cheapest hours to charge, heat and store
Spot prices move hour by hour, and the gap between the cheapest and the most expensive hours of a day can be large. VoltCast highlights the cheapest charging window for your EV, and the same hours work for anything flexible: running a heat pump or water heater harder when power is cheap, charging a home battery, or starting the dishwasher and washing machine later in the evening.
An outlook for the rest of the week
Not every decision is about tomorrow. VoltCast shows daily averages for the coming days and marks the cheapest day of the week, so you can see whether it is worth waiting a day or two before a big charge. Days that are not yet published are labelled as estimates and can change; published prices are always shown as published.
Price alerts
Turn on alerts and VoltCast can notify you on your iPhone when cheap hours are coming up, so you do not have to remember to check.
Where VoltCast works
The app covers 30+ European day-ahead price zones – from the Nordic and Baltic zones to Germany, France, Spain, Italy and Central and South-East Europe – plus Great Britain, the United States (New York City, Northern and Southern California, and the Texas hubs North, Houston, South and West), Australia's National Electricity Market regions (New South Wales, Queensland, Victoria, South Australia and Tasmania), Japan, Mexico, Brazil, Canada (Ontario) and South Korea. In the US the app shows wholesale day-ahead hub prices, not retail rates. Want to check prices in a browser first? See electricity prices by zone or pick a zone:
- Sweden: SE1 Luleå, SE2 Sundsvall, SE3 Stockholm, SE4 Malmö
- Norway: NO1 Oslo, NO2 Kristiansand, NO3 Trondheim, NO4 Tromsø, NO5 Bergen
- Denmark: DK1 West Denmark, DK2 East Denmark
- Estonia: Estonia
- Latvia: Latvia
- Lithuania: Lithuania
- Germany: DE-LU
- Netherlands: Netherlands
- Belgium: Belgium
- France: France
- Austria: Austria
- Poland: Poland
- Spain: Spain
- Portugal: Portugal
- Italy: IT-North
- Switzerland: Switzerland
- Czech Republic: Czech Republic
- Slovakia: Slovakia
- Hungary: Hungary
- Slovenia: Slovenia
- Croatia: Croatia
- Romania: Romania
- Bulgaria: Bulgaria
- Greece: Greece
- Australia: New South Wales, Queensland, Victoria, South Australia, Tasmania
- Great Britain: Great Britain
- United States: North Texas, Houston, South Texas, West Texas, Southern California, Northern California, New York City
Get VoltCast on the App Store
Know whether tomorrow is cheaper before you plug in, and plan the week's charging and heating around the cheapest hours.
Download on the App StoreFAQ
When are tomorrow's electricity prices published?
In most European price zones the day-ahead prices for the next day are published around 13:00 CET. In Great Britain they follow around 11:30 UK time, and for the US hubs late morning or early afternoon local time. VoltCast shows them as soon as they are available. Australia's NEM is a real-time market, so tomorrow's figures there are estimates that update through the day.
Which countries and price zones does VoltCast cover?
The iPhone app covers 30+ European day-ahead price zones – Sweden (SE1–SE4), Norway (NO1–NO5), Denmark (DK1, DK2), Estonia, Latvia, Lithuania, Germany/Luxembourg, the Netherlands, Belgium, France, Austria, Poland, Spain, Portugal, Northern Italy, Switzerland, Czech Republic, Slovakia, Hungary, Slovenia, Croatia, Romania, Bulgaria and Greece – plus Great Britain; the United States (New York City, Northern and Southern California, and the Texas hubs North, Houston, South and West); Australia's NEM regions (New South Wales, Queensland, Victoria, South Australia, Tasmania); Japan (9 JEPX areas); Mexico; Brazil; Canada (Ontario); and South Korea. US prices are wholesale day-ahead hub prices, not retail rates.
Are the prices in VoltCast final?
Published day-ahead prices are the final spot prices for that day. Where available, days further ahead are shown as estimates, clearly labelled, and they can change. Spot and wholesale prices do not include your retailer's margin, network fees or taxes.
Does VoltCast control my car, charger or heat pump?
No. VoltCast shows prices and the cheapest times. You decide when to charge or run appliances, for example by setting the schedule in your charger or car app.
Which devices does VoltCast run on?
VoltCast is an iPhone app, available on the App Store.