# Optimal° — Tankless Water Heaters > Remote control and monitoring for Optimal Opti Tankless Water Heaters. (iPhone/iPad app by Its Optimal LLC.) - Source: https://appshunter.io/ios/app/optimal/id6473653236 (this page in markdown: same URL + `.md`) - Developer: [Its Optimal LLC](https://appshunter.io/developer/1719356914) - Category: Utilities - Price: Free - Rating: 4.86/5 from 7 App Store ratings · 5 written reviews indexed - Age rating: 17+ - Requires: iOS 15.1 · 19 MB - Languages: English - Released: 2024-05-25 - Data updated: 2026-06-01 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/optimal/id6473653236/reviews.md ## What is Optimal°? Control and Monitor your Optimal Opti Tankless Water Heater with the Optimal° connected app. Optimal° app allows you to control temperature, monitor performance and unit diagnostics, giving you full control of our hot water services. Optimal's patent pending ultrasonic flow sensors allow you to add your water heater to your smart home intelligence. Optimal° allows you to precisely customize how hot water is delivered to your faucets. Save money, be efficient and that's Optimal. Current App Version functionality. - Set water heater output temperature - Unit activity state (heating / not heating) - Gallons / min flow rate - Kilowatts per hour rate - Inlet Water Temperature - Outlet Water Temperature - Input Voltage - Available Flow Rate - Heater Capacity - Vacation Mode - Diagnostics / Error Code Reporting ## Key features - Set water heater output temperature - Monitor unit activity state - Track flow rate and energy consumption - View inlet and outlet water temperatures - Access diagnostics and error codes - Enable Vacation Mode ## Recent user reviews (5 of 5) All indexed reviews: https://appshunter.io/ios/app/optimal/id6473653236/reviews.md ### 2/5 — Buggy App *2026-02-10* I really wanted to write an awesome review. I like tech and this product is in line with that ethos. Tankless water heater is great. The app however is very bad. It keeps disconnecting from the app. The water heater also goes offline a lot. Not related signal because it literally sits 2 feet from the router. Also, the measured gallons and power consumption data on the app are not even close to accurate. If you want a good heater then you’ll get one. But if you want a good app and smart features you will be frustrated. ### 3/5 — Awesome Tank *2026-01-26* Tank works well. App issues include inaccurate water flow and electrical usage. What’s with the constant app sign out? Constant 502 and 504 bad gateway issues as well. Very annoying. ### 4/5 — Awesome Tank *2026-01-24* Tank works well. App issues include inaccurate water flow and electrical usage. What’s with the constant app sign out? Very annoying. ### 4/5 — Awesome Tank *2025-04-13* Tank works well. App issues include inaccurate water flow and electrical usage. ### 5/5 — Great replacement! *2025-01-16* Excelente service, easy swap from another tankless to It’s optimal ## Frequently asked questions about Optimal° ### What can I control with the Optimal° app? The Optimal° app allows you to set the water heater output temperature, monitor its activity state (heating/not heating), and view real-time data like flow rate and energy consumption. You can also access diagnostics and error codes. ### Does Optimal° have ads? No, Optimal° does not contain advertisements. It is a free application designed to provide seamless control and monitoring of your Optimal Opti Tankless Water Heater. ### What devices is Optimal° compatible with? Optimal° is available for iPhone and iPod devices. The app is designed to work with specific Optimal Opti Tankless Water Heater models. ### How often is Optimal° updated? The latest version of Optimal° is 3.0.2, last updated on August 26, 2025. Updates typically focus on improving functionality and compatibility with the water heater units. ### What is the age rating for Optimal°? Optimal° has an age rating of 17+. This rating is generally applied to apps that may contain content or features not suitable for younger audiences, though the specific reasons are not detailed. ### Can Optimal° help me save money? Yes, by allowing precise customization of hot water delivery and monitoring energy usage (Kilowatts per hour rate), Optimal° helps users be more efficient and potentially save money on energy costs. ### What kind of performance data does Optimal° provide? Optimal° provides detailed performance data including gallons per minute flow rate, kilowatts per hour rate, inlet water temperature, outlet water temperature, and available flow rate. It also reports input voltage and heater capacity. ### What is Vacation Mode in Optimal°? Vacation Mode in the Optimal° app allows you to set your water heater to an energy-saving state while you are away. This feature helps conserve energy when hot water is not needed regularly. ## Version history (last 4 releases) ### 3.0.2 — 2025-08-26 This version includes vacation mode flow detection and various fixes and improvements ### 3.0.1 — 2025-01-08 This version adds support for user account creation and for managing multiple water heaters. Each heater can be tagged with a location and a name. Meanwhile, an all-new Metrics page provides insights on energy and water usage over time. ### 1.0.1 — 2024-08-21 Register Warranty CTA from the Settings tab ### 1.0 — 2024-05-25 No release notes. ## Apps similar to Optimal° | App | Rating | Price | Category | | --- | --- | --- | --- | | [NICE DIGI](https://appshunter.io/ios/app/nice-digi/id1662510208) | 2.7 (36) | Free | Utilities | | [Sup-Anesok](https://appshunter.io/ios/app/sup-anesok/id1633412853) | 2.4 (107) | Free | Utilities | | [EcoNet](https://appshunter.io/ios/app/econet/id1610093590) | 4.4 (11,219) | Free | Utilities | | [X-Sense Home Security](https://appshunter.io/ios/app/x-sense-home-security/id1568666708) | 4.8 (3,035) | Free | Utilities | | [RouteThis Helps](https://appshunter.io/ios/app/routethis-helps/id1173976362) | 2.0 (198) | Free | Utilities | | [Della+](https://appshunter.io/ios/app/della-plus/id1590950655) | 3.9 (378) | 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 2026-06-01.*