When your radiators are enclosed, the temperature reading of the Smart Radiator Thermostat might be significantly higher than the room temperature. While you can set an offset for the reading, this might still influence your room temperature control negatively.
To achieve an accurate reading, you can install a Smart Thermostat as wireless thermostat in the room. This will make it easier for you to adjust the target temperature, when the app is not at hand. In addition, temperatures in the Smart Schedule can be set with decimal precision if a Smart Thermostat is installed in the room.