HelloSteam app for iPhone and iPad
The app comes for free with IoT unit for smart home - learning thermostat for hot water tanks. It allows automated or manual scheduling of the water heating, as well as tracking the history of hot water and electricity used for the purpose.
It also provides leak detection and safety features. Visit hellosteam.com for description and special offer.
There is no use for the app without the physical unit. An account opening is possible with unit purchase.