Some systems also have a holiday mode that will keep your home just warm enough to prevent pipes freezing if you are away.
Others might not be as fancy, but they can still be controlled using your smart devices. Your smart thermostat’s functionality will depend on the make and model you buy, and how much you’re willing to spend.
If you have other smart systems, such as for lighting or smart assistants, you may also want to check for compatibility. And if you have a hot water tank, they may also allow you to control your hot water, but you might need additional kit to be able to do this.
You may also want to check the security of any system you choose to make sure it doesn't provide a back door to your home WiFi.