WattSaver for Octopus Energy
iOS Universel / Utilitaires
WattSaver helps Octopus Energy customers find cheaper times to run appliances, charge devices, and plan around changing electricity prices.
Pick what you want to run, set how long it takes, and WattSaver scans the available half-hour slots to show the best start time and estimated cost. It works with Octopus import and export tariffs, including Agile, Tracker, Flexible, Intelligent Octopus Go, and compatible smart tariffs.
Connect your Octopus account to auto-detect your tariffs, or choose a product and tariff manually if you just want to explore prices before switching.
Key features:
- Find the cheapest time to run any appliance
- See today and tomorrow's half-hour prices
- View smart meter usage by day, week, month, or year
- Compare usage, cost, export profit, and net value using the tariffs active at the time
- Compare import and export rates
- Use scheduling constraints such as earliest start, latest finish, delayed start, and finish-by times
- Save device templates for quick recall
- View price history with colour-coded highs and lows
- Get optional notifications when selected rates are published
- See Intelligent Octopus Go cheap slots where available
- Use WattSaver on iPhone, iPad, Mac, and Apple Watch
Predbat support:
If you use Predbat, WattSaver Pro can import your Predbat plan page and use that plan data alongside Octopus prices. Imported Predbat data can be shown on charts and can help scheduling prefer battery charging windows, excess solar, or peak solar periods where your plan includes those signals.
WattSaver does not measure your solar generation or battery state directly. Predbat solar, excess solar, and battery information is read from the Predbat plan URL you provide.
Free features include basic scheduling, current prices, and one saved template. Some advanced features require the one-time WattSaver Pro purchase.
WattSaver is an independent app and is not affiliated with Octopus Energy or Predbat.
Quoi de neuf dans la dernière version ?
WattSaver 7.0 — Compare usage, smarter widgets and a faster Usage view.
- New Compare screen: compare one period with another, including import, export, gas, net electricity and overall net cost
- Quickly compare against the previous period or the same period last year, with matched date ranges, aligned charts, totals, deltas and daily averages
- Redesigned widgets with cleaner tiles, a clearer Live view, and current electricity and gas unit prices alongside your live readings
- Small widget rebuilt for readability with larger Live, Import, Export and Gas tiles, plus battery state and solar in the header
- Usage is much faster on long ranges: year views load and scroll smoothly, and date pickers stay responsive
- Fixed missing costs on in-progress week, month and year views
- Fixed long-range export totals by using Octopus meter readings across the full period
- Fixed missing gas costs when meter readings skip days
- Fixed a crash when the app was backgrounded during a long data load
- Improved handling for tariff changes, Home Assistant refreshes and standing charges
