There are lots of options, I've got one of these Netatmo ones which was cheap and, most importantly, really easy to fit with a variety of different installation options.
Doesn't do the learning stuff but being able to switch your heating off remotely has been invaluable at times.
I have a netatmo too - the only 'smart' aspect is the heating comes on before the setpoint or something like that. Not that I am too bothered about that right now
My thermostat is a bit old and sometimes loses connection to our boiler. Should I get a Nest thermostat fitted?