10 Best Thermostat Controlled By Phone 2026 in the United States

The Google Nest Learning Thermostat (4th gen) is a smart thermostat designed to make managing your home's heating and cooling easy and energy-efficient through your phone or voice commands. It works with most common heating systems without needing extra wiring, which simplifies installation for many homes. You can control it from the Google Home app or with Alexa, Siri, or Google Assistant, giving flexible options to fit your smart home setup.

Its user interface is very user-friendly, featuring a large, bright, and clear round display that you can customize with different designs and which automatically adjusts brightness based on your room lighting. The thermostat learns your schedule over time and suggests energy-saving changes, but it always asks for your approval before making adjustments, helping you stay in control. It also uses outside weather information to optimize heating and cooling, which can help save on energy bills by about 12% for heating and 15% for cooling. The included Nest Temperature Sensor lets you monitor and control temperatures in different rooms, tackling hot or cold spots effectively. Geofencing features automatically switch the system to energy-saving modes when you leave and return, making it convenient without needing manual changes.

Installation is relatively straightforward, especially since it usually doesn’t require a common wire (C wire), though checking compatibility with your system beforehand is recommended using Google's Compatibility Checker. The thermostat requires battery replacement (one CR2 battery included), which adds minor maintenance. While it supports many smart home platforms, some users might find the Google Home app less intuitive initially if new to smart home tech. Additionally, very complex or unusual HVAC systems may not be fully compatible. This thermostat is a strong choice for homeowners wanting an easy-to-use, smart, and energy-saving system controllable from their phone, with added comfort through learning capabilities and multi-room sensing.

The Amazon Smart Thermostat is designed to help users transition from traditional thermostats to a more energy-efficient solution. One of its main strengths is its compatibility with Alexa and Ring, allowing for easy control via voice commands or the Alexa app. It also features temperature sensors that can address hot or cold spots using compatible Echo devices, enhancing comfort throughout your home. Energy savings are a notable highlight, with the potential to reduce bills by about $50 annually due to its ENERGY STAR certification.

Installation is fairly user-friendly, guided by the Alexa app, although it requires a C-wire, which might not be available in every home. If your home lacks this wiring, you’ll need to purchase a power adapter separately. The thermostat has a pleasant ability to learn your habits through 'Hunches,' adjusting temperatures automatically based on your activity and schedules.

There are a few drawbacks. It only supports 2.4 GHz networks and lacks built-in far-field microphones for voice control, meaning you’ll need an Echo device for that feature. Additionally, while it provides a range of app-based features such as energy reports and geofencing, it may not be as intuitive for users unfamiliar with smart home technology. This thermostat is a great fit for tech-savvy homeowners looking to save on energy bills and control their home environment remotely. However, those less comfortable with technology or lacking the necessary wiring might find it more challenging to set up and operate effectively.

The ecobee New Smart Thermostat Premium stands out with its compatibility with a wide range of HVAC systems and popular smart home platforms like Siri, Alexa, and Google Assistant. It offers excellent connectivity via Wi-Fi and Bluetooth, ensuring you can control your home's temperature from your phone or through voice commands. The user interface is intuitive, featuring a vibrant display that makes it easy to navigate and adjust settings. Learning capabilities are strong, with the included SmartSensor helping to minimize hot and cold spots by adjusting the temperature in specific rooms.

Additionally, the thermostat provides detailed energy reports, assisting you in optimizing energy usage and potentially saving up to 26% on heating and cooling costs annually. Geofencing is another useful feature, automatically adjusting the temperature when you leave or return home to save energy. Installation is made simpler with the included Power Extender Kit for homes without a C-wire, and the comprehensive quick start guide helps streamline the setup process. However, some users might find the need for a subscription to access certain advanced features, such as smoke alarm detection and break-in alerts, a bit of a drawback.

Additionally, while the built-in air quality monitor is a nice touch, it may not be a primary selling point for everyone. The thermostat's design is sleek and modern, and the added functionality of a smart speaker with the choice of Siri or Alexa integration is a significant plus. This thermostat is well-suited for tech-savvy homeowners looking for a comprehensive, smart home-compatible solution that offers convenience, energy savings, and enhanced home monitoring capabilities.