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Best Smart Thermostat Apps

250+ iOS apps curated and reviewed

4.2 avg rating
20 free apps
Updated September 2026

Looking for free smart thermostat apps? 20 of our 250+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Compare top Smart Thermostat Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1ecobeeecobeeFree4.8★ (202K)NoYesSep 2026
2NestNestFree4.6★ (2.6M)NoNoSep 2026
3Amazon AlexaAmazon AlexaFree4.5★ (5.9M)NoYesSep 2026
4Total Connect ComfortTotal Connect ComfortFree4.3★ (76K)NoNoSep 2026
5SensiSensiFree4.6★ (243K)NoNoSep 2026
6Resideo - Smart HomeResideo - Smart HomeFree4.6★ (571K)NoNoSep 2026
7Google HomeGoogle HomeFree4.6★ (1.4M)YesNoSep 2026
8Smart Thermostat by NV EnergySmart Thermostat by NV EnergyFree1.9★ (154)NoNoSep 2026

Top Picks for Smart Thermostat

ecobee#1

ecobee by ecobee Ltd.

Imagine what home could be
Editor's Choice
🌟 Lifestyle
4.8😐(202K ratings)
FreeIn-App Purchases
#84in Lifestyle
ecobee screenshot 1
ecobee screenshot 2
ecobee screenshot 3
ecobee screenshot 4
ecobee screenshot 5

Control your smart home devices, including thermostats, cameras, and sensors. Automate your home for comfort and peace of mind, and monitor entryways and cabinets with intelligent alerts. Save energy with custom schedules and find potential rebates.

What We Love

  • 🚀 Convenient remote control
  • 🔒 Secure connectivity
  • 👍 Intuitive interface
  • 👍 Helpful scheduling features
  • 👍 Reliable hardware

Room to Improve

  • 🐛 Buggy app updates
  • 🕰️ Slow app response times
  • 🔀 Confusing UI changes
  • 🔋 Frequent disconnections
  • 🤖 Unreliable voice assistant integration
Nest#2

Nest by Nest Labs

Strong Contender
🌟 Lifestyle
4.6😞(2.6M ratings)
Free
#94in Lifestyle
Nest screenshot 1
Nest screenshot 2
Nest screenshot 3
Nest screenshot 4
Nest screenshot 5

Control your smart home devices, including thermostats, security systems, cameras, and smoke detectors, all from a single app. Receive alerts, manage schedules, and automate actions based on your presence.

What We Love

  • 🚀 Easy to use
  • 🔒 Reliable security features
  • 📽️ Good video quality
  • 🔔 Useful alerts and notifications
  • 🌐 Convenient remote access

Room to Improve

  • 🐛 Frequent connectivity issues
  • ⏱️ Slow app performance
  • 🔒 Overly complex setup and login process
  • 💰 Expensive subscription required for full functionality
  • 🔋 Battery life issues with cameras
Amazon Alexa#3

Amazon Alexa by AMZN Mobile LLC

Worth Considering
🌟 Lifestyle
4.5😐(5.9M ratings)
FreeIn-App Purchases
#15in Lifestyle
Amazon Alexa screenshot 1
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Amazon Alexa screenshot 5
Amazon Alexa screenshot 6

Manage your smart home devices, control music, and organize your day with voice commands. This app allows you to set up and interact with compatible devices, discover new skills, and stay connected with others. It learns your preferences for a personalized experience.

What We Love

  • 🚀 Convenient for controlling smart devices
  • 🚀 Helpful for managing reminders and playing music
  • 👍 Alexa is a great companion
  • 👍 Alexa is funny, nice, and kind
  • 👍 Alexa is a lifesaver for the elderly
  • 👍 Alexa has changed the family's life for the better

Room to Improve

  • 🐛 Frequent crashes and bugs
  • 🐛 Inconsistent voice recognition
  • 🐛 Cluttered and unintuitive interface
  • 🐛 Slow and unresponsive app
  • 🐛 Alexa sometimes ignores commands or gives irrelevant responses
  • 🐛 Alexa unable to properly control smart home devices
  • 🐛 Alexa can't distinguish between different users in the household

More Smart Thermostat apps to explore

FAQ about Smart Thermostat

What are the best smart thermostat apps for iPhone?
ecobee tops our smart thermostat apps ranking as of September 2026, with a 4.8-star average from 202K App Store ratings, and it's free to download.
Yes — 20 of the top smart thermostat apps we rank are free to download, including ecobee and Nest.
ecobee has no ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 250+ smart thermostat apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
The ecobee app allows you to control various smart home devices, including SmartThermostats, SmartCameras, and SmartSensors. It helps you manage your home's comfort, security, and energy usage remotely. You can set schedules, create automations, and receive alerts for specific events.
Key features include controlling ecobee smart devices, step-by-step installation guides for new devices, customizable thermostat schedules for energy savings, home automation with Autopilot, and intelligent alerts for monitoring entryways and cabinets. It also helps users search for potential energy rebates.

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