# ThermoSave — Cut your electricity bill > Smart water heater controller for electricity bill savings. (iPhone/iPad app by ThermoSave.) - Source: https://appshunter.io/ios/app/thermosave/id6762540877 (this page in markdown: same URL + `.md`) - Developer: [ThermoSave](https://appshunter.io/developer/1894598615) - Category: Utilities, Productivity - Price: Free - Rating: 5.00/5 from 4 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 16.0 · 22 MB - Languages: American English - Released: 2026-04-23 - Data updated: 2026-09-23 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/thermosave/id6762540877/reviews.md ## What is ThermoSave? 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 ## Key features - Automated off-peak water heating - Reduces electricity bills - Ensures hot water availability - Works with existing water heaters - Easy installation - Compatible with major US utilities ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/thermosave/id6762540877/reviews.md ### 5/5 — Solid! *2026-05-05* I was skeptical at first, but ThermoSave has genuinely changed how I think about home energy use. It automatically shifts water heating to lower-cost windows throughout the day, and my electricity bill reflects. We haven’t run out once since installing it. If you have an electric water heater, this is a no-brainer. ### 5/5 — Easy to get started *2026-04-24* Setup of the device was very easy, took just a few minutes. ## Frequently asked questions about ThermoSave ### How much can ThermoSave save me on electricity bills? Users can expect savings of up to $200 - $500 per year or more on Time-of-Use (TOU) utility plans. These savings are achieved by automatically heating water during cheaper off-peak electricity hours. ### Does ThermoSave require a plumber for installation? No, ThermoSave is designed for easy installation and does not require a plumber. It works with your existing electric resistance tank water heater. ### What type of water heaters is ThermoSave compatible with? ThermoSave is compatible with standard electric resistance tank water heaters (240V). It is not designed for gas water heaters or tankless electric models. ### Which US utilities support ThermoSave? ThermoSave is compatible with major US utilities that offer time-of-use rate plans, including APS, PG&E, and Xcel Energy, among others. ### What are the requirements to use ThermoSave? To use ThermoSave, you need the ThermoSave hardware controller, which is available for purchase separately. A WiFi connection is also required during the initial setup process. ### How often is ThermoSave updated? The latest version of ThermoSave is 1.3.0, and it was last updated on June 23, 2026. Updates typically focus on improving performance and compatibility. ### What is the age rating for ThermoSave? ThermoSave has an age rating of 4+, making it suitable for a wide range of users. The app itself does not contain any mature content. ### Does ThermoSave have ads? No, ThermoSave does not contain advertisements. As a free utility app, it focuses on providing its core functionality without interruption. ## Version history (last 5 releases) ### 1.4.0 — 2026-09-18 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. ### 1.3.1 — 2026-08-11 - Fixed issue with WiFi setup, in particular with Eero routers. - Improved WiFi setup: clearer guidance when setup fails. - Bug fixes and reliability improvements. ### 1.3.0 — 2026-06-23 - Control heating mode directly from the app - When adding multiple devices, selects the new device when completing setup, and remembers the last selected device when resuming the app - Improved email validation with clearer error messages during sign-in ### 1.2 — 2026-05-18 • New status card shows live water heater state — heating, ready, paused, or away • Schedule tab lets you view and manage peak-hour heating times • Your device is now automatically named "Home" on first setup • Fixed an issue that could sign you out unexpectedly when resuming the app ### 1.1 — 2026-05-05 Added email sign-in and device ownership - your ThermoSave is now securely linked to your account during setup. ## Apps similar to ThermoSave | App | Rating | Price | Category | | --- | --- | --- | --- | | [Battemax](https://appshunter.io/ios/app/battemax/id6747614735) | — | Free | Utilities | | [VeeRecon](https://appshunter.io/ios/app/veerecon/id6751036808) | — | Free | Utilities | | [Union ID: Member ID Card](https://appshunter.io/ios/app/union-id-member-id-card/id1509551248) | 5.0 (2) | Free | Utilities | | [ChargingRewards](https://appshunter.io/ios/app/chargingrewards/id1633467570) | 3.2 (15) | Free | Utilities | | [BrickTrack](https://appshunter.io/ios/app/bricktrack/id1619644538) | 5.0 (5) | Free | Utilities | | [UseeProMax](https://appshunter.io/ios/app/useepromax/id6720728442) | — | Free | Utilities | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-23.*