You can set formula mode in wakeup mode, home mode, product settings for manual use and for in app use.
To set formula mode for in app use first find formula mode by selecting network, select the iKettle 3rd generation you wish, select features at the top right hand corner of the screen and select formula mode.
When you are in formula mode the first option is to enable formula mode, once enabled there will be two temperatures to set, heat to and cool to, select the temperature you wish the kettle to boil to by selecting heat to then select the temperature you wish to be notified that the water has cooled to.
The cool to will be the default cool to temperate when you open the app.
Now simply select start and the kettle will boil to your heat to temperature cool down to your cool to temperature and notify you.
You can change the cool to temperature by changing the dial to the desired temperature when formula mode is enabled. The app will ask you to adjust your cool to temperature.
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