IDUNN Spa

- Temperature warning is now orange instead of red. It appears when the tub fills with water warmer than your set maintenance temperature, and explains that the fill water temperature comes from your external hot water source and can't be controlled in the app. The same note also shows under the temperature slider before a program starts and while filling. - Turning off the heater is now a separate button. The Set button always applies the temperature and can no longer switch the heater off by accident. To turn the heater off, tap the orange power icon next to it and confirm. The icon only appears while the heater is actually running. - Temperature calibration now requires a full tub. The Calibration button and the measured temperature field stay disabled until the Oxygen Program has filled the tub, with a message explaining why. They unlock automatically once it's full.