As of 2015, remote control by smartphones, tablets and computers is available on select models of Honeywell thermostat systems, including RTH9580 and RTH8580WF. A free app allows users to control the temperature level, startup, shutdown and other features on programmable thermostats.
Smartphone control is limited to wireless thermostats, and depending on the model, users may be able to receive maintenance reminders or temperature alerts on their phones. Wireless thermostats typically receive the latest software updates automatically, and some models adapt to the owner's usage patterns by fine-tuning the temperature based on frequently used programming cycles. Honeywell's smart thermostats usually aren't compatible with electric baseboard heaters, so buyers should make sure their existing systems are compatible before making a purchase.