ThermoSave
Cut your electricity bill
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
ThermoSave turns your electric water heater into a smart energy asset — automatically heating water when electricity rates are lowest and avoiding expensive peak hours.
ThermoSave connects to your home WiFi and lets you set peak schedule to avoid. It pre-heats your water tank during cheap off-peak hours so you always have hot water when you need it — without paying peak rates.
What you get
- Up to $200 - $500/year or more in electricity savings on TOU utility plans
- Always-hot water — no cold showers, no compromises
- Works with your existing electric resistance water heater
- No plumber needed — easy installation
Works with standard electric resistance tank water heaters (240V). Compatible with major US utilities on time-of-use rate plans including APS, PG&E, Xcel Energy, and more.
Requires
- ThermoSave hardware controller (available at thermosave.com).
- Electric water heater within WiFi range
Energy on your Home screen
See what your water heater used each day, and when it actually drew power. Drag the chart left or right to move between days, or tap the date to jump back to today. Press and hold anywhere on the chart to read any five minutes — the time, the draw, and whether the heater was powered. Today's card fills in as the day goes on and marks where "now" is. The chart works with VoiceOver: it reads out the day's energy and powered time, and offers actions to move between days.
Your heater's clock, not your phone's
Times across the app now follow the timezone your water heater is set to. If your heater isn't in the same timezone as you — or you're travelling — energy history and peak hours now line up correctly.
Device info shows your heater's timezone, so you can check which clock it's running on.
The developer, ThermoSave, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Contact Info
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- ThermoSave LLC
- Size
- 23.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 ThermoSave LLC
