WattSaver for Octopus Energyv8.2

Released September 10, 2026Major

iOS

The latest update introduces significant feature expansion for energy tariff management and widget accessibility. As no performance data is available for the current release, the impact remains neutral. Future analysis will focus on whether these additions improve user retention metrics.

What changed

New featureNew method to fetch off-peak schedules directly from accounts for Intelligent Octopus Go tariffs
New featureIntegration of free electricity sessions into pricing, schedules, and widgets
New featureDisplay of Weekend Happy Hour and Free Electricity Reward credits in Usage view
New featureNew Compare Tariffs screen to simulate costs across different tariff types
MonetizationPrice widget made free for all users without requiring Pro subscription
MonetizationSupport for purchasing WattSaver Pro directly on Apple Watch
New featureReal-time tracking and visualization of bonus smart charging slots
RetentionPush notifications for bonus smart charging slots scheduled outside fixed windows
UXNew Compare screen for period-over-period analysis of import, export, and gas costs
UXRedesigned widgets with cleaner tiles and live electricity/gas unit prices

Reception

50/ 100 impact scoreNeutral

What worked

Monetization
The transition of the price widget to a free tier removes a friction point for casual users.

What didn't

New feature
no evidence
The lack of user feedback windows prevents validation of the new tariff comparison and scheduling tools.

Marlvel takeaways

Monitor the adoption rate of the newly free price widget to determine if it drives higher daily active usage.
Track support tickets related to the new Intelligent Octopus Go tariff fetch method to identify potential API authentication failures.
Evaluate the conversion rate for WattSaver Pro purchases initiated via the Apple Watch interface.

Original release notes

WattSaver 8.2

- Fixed "Not connected" and missing import prices on the newest Intelligent Octopus Go tariffs: Octopus no longer publishes their unit rates publicly, so WattSaver now reads the off-peak schedule straight from your account
- Free electricity sessions: the hours Octopus gives away free are priced at £0 in your prices, schedule, widgets and recent costs
- Weekend Happy Hour and Free Electricity Reward credits now appear in Usage, with the amount Octopus credited for each period

Also in this release:

- Compare Tariffs screen: pick a period and any tariff available in your region, and see what you actually paid next to what that same usage would have cost on Agile, Tracker, Flexible or anything else
- The price widget is free: put the current Octopus unit rate and today's prices on your home screen without WattSaver Pro
- Buy WattSaver Pro directly on your Apple Watch
- Intelligent Octopus Go: price and usage views reveal the bonus cheap slots Octopus schedules for your charging, applied to your prices and recent costs and refreshed as Octopus re-plans them
- Get notified when Octopus schedules a bonus smart charging slot outside your fixed overnight window
- View Agile Export Rates screen, with the colour scale flipped so the best-paid export slots stand out
- Compare screen: compare one period with another, including import, export, gas and overall net cost, with matched date ranges, aligned charts, totals and deltas
- Redesigned widgets with cleaner tiles, a clearer Live view, and current electricity and gas unit prices alongside your live readings