Is it possible to use a smart plug or a timer to control my heating?

This depends on the design of the heater. A heater with touch buttons will probably not be able to work with a controlled socket because it will probably not be equipped with a memory to restart the heater in its initial position. On the other hand, a heater with mechanical buttons should be able to be controlled. This is the case for ANNA, ANNA Little and YRON. However, make sure to check the power of your socket. A heater consumes between 1200 W and 2500 W. So make sure that your socket supports at least 2000 W for these heaters.