Roberts Hot Tub Controller vs Simmerdial

The RHtubs Controller App, is an app for your iOS device that allows you to access your hot tub via a direct connection anywhere in the local proximity of your tub, anywhere in your house that you can connect to your local WiFi network. The App is the only control that works with the Roberts Hot Tubs Controller and has full functionality to set temperature, filtration cycles and to turn pumps on and off. Freeze controllers are also already built in by default.

Simmerdial brings a familiar kitchen timer to your iPhone. Turn the dial clockwise to set a time. Release to start. From eggs and tea to baking, set your timer and get back to the task at hand. A short illustrated guide walks you through the basics on first launch. TURN TO SET Choose up to 60 minutes in 15-second steps. Mechanical clicks and haptic feedback make each turn feel familiar. Mute the dial sound whenever you like. SEE WHAT IS LEFT The orange ring shows time remaining at a glance. Adjust the dial while the timer runs, tap to add five minutes, or reset to start over. HEAR WHEN IT IS READY Allow system alerts and, once the alarm is scheduled, it can ring when your iPhone is locked or the app is closed. Check the live countdown on your Lock Screen or in the Dynamic Island on supported iPhones. MAKE IT YOURS Choose light, dark, or your system appearance. Open iOS Settings from the app menu to change the app language. Available in English, Simplified Chinese, and Japanese. KEEP IT SIMPLE No account, ads, or tracking SDKs. Timer state, sound settings, and appearance preferences stay on your device. Timing works offline. VoiceOver lets you adjust the time, and Reduce Motion is supported. For iPhone with iOS 26 or later. System alerts require permission. If permission is off or an alarm cannot be scheduled, keep the app open to hear the alert. Dynamic Island features require a supported iPhone.