4 best smart thermostats with app control: our comparison (June 2026)

26 June 2026 1 min read
Discover our ranking of the 4 best smart thermostats with app control based on our tests.

Ranking

#1 🏆 Best choice
Smart Thermostat X – Starter Kit Wired Room Thermostat & Bridge X, Control via App & Smart Speaker (Alexa, Siri, Google Assistant), DIY Installation X Starter Kit: Wired Heating Starter Kit

tado

Smart Thermostat X – Starter Kit Wired Room Thermostat & Bridge X, Control via App & Smart Speaker (Alexa, Siri, Google Assistant), DIY Installation X Starter Kit: Wired Heating Starter Kit

🔥 Populaire
  • Clean, minimal design with a solid-feeling thermostat and discreet bridge
  • Reliable core features: scheduling, app control, voice assistant support, and clear temperature/humidity graphs
  • Matter and Thread support for better smart home integration and future-proofing
The tado Smart Thermostat X Starter Kit is a solid choice if you want to move from a dumb wired thermostat to something you can control from your phone or smart speaker. The hardware feels decent, the app is clear once you get used to it, and the basic features – scheduling, remote control, voice control, and temperature/humidity graphs – all work reliably. The Matter/Thread support is a bonus if you’re trying to build a modern smart home setup that doesn’t depend on one brand’s ecosystem.Where it falls down a bit is on installation complexity and subscriptions. For simple systems, the online step-by-step guide is enough and you can get it running in under an hour. But with some UK-style boilers or more complex wiring, you might hit a wall and need tado support to enable certain modes in the background. That’s not great for something that advertises DIY installation. On top of that, a bunch of the more attractive AI features – proper automatic geofencing, open window automation, deeper energy insights – sit behind a paid plan. The thermostat is still very usable without it, but you need to go in knowing that.If you want a clean-looking thermostat, decent app, and you’re comfortable either DIY-ing or at least reading wiring diagrams carefully, this is a good option. If you’re in the UK with a more traditional multi-zone or complex system, or if you hate subscriptions on principle, you might be happier with something like Drayton Wiser or Hive that’s more tailored to that market and leans less on paid add-ons. Overall, I’d give the tado Smart Thermostat X a thumbs up for tech-savvy users with compatible boilers, and a cautious “maybe” for everyone else.
8.3 /10
★★★★★ ★★★★★
🌟 Excellent See full review →
See offer Amazon
#2 💰 Best price
Beok Smart Thermostat for Combi Boiler, Wifi thermostat 2-Wire for Boiler Heating Compatible with Tuya app, Programmable Digital with Voice Control, Battery-powered Surface Mount White

BEOK CONTROLS

Beok Smart Thermostat for Combi Boiler, Wifi thermostat 2-Wire for Boiler Heating Compatible with Tuya app, Programmable Digital with Voice Control, Battery-powered Surface Mount White

  • Good value: Wi‑Fi, app control, and scheduling for a low price
  • Simple 2‑wire dry contact relay works well with many older combi boilers
  • Tuya/Smart Life app is stable and responsive, with up to 6 time slots per day
After using the Beok WR‑03 for a while, my overall impression is pretty straightforward: it’s a cheap smart thermostat that does its core job correctly, with some rough edges. It switches the boiler on and off at roughly the right temperature, the Wi‑Fi connection is stable, and the Tuya/Smart Life app works better than I expected for this price range. Scheduling is flexible enough for everyday life, and being able to tweak everything from my phone is a real practical benefit.On the flip side, the build quality is clearly budget and the documentation is weak. Installation and setup are manageable if you’re a bit handy and not scared of basic wiring and app pairing, but it’s not idiot‑proof. Voice control works, but especially with Alexa you may need to fiddle a bit. Long‑term durability is also a question mark: it feels fragile, so I wouldn’t treat it roughly or expect it to last forever.Who is it for? People with a 2‑wire combi boiler who want simple smart control, are okay with a no‑frills plastic box on the wall, and want to spend as little as possible. Who should skip it? If you hate dealing with tech, want premium build and a super polished experience, or need advanced features like learning algorithms and detailed energy reports, you’re better off with a more expensive brand. For me, it’s a good value, pragmatic choice, as long as you go in with realistic expectations.
8.1 /10
★★★★★ ★★★★★
🌟 Excellent See full review →
See offer Amazon
#3
° Smart Radiator Thermostat X, Temperature Control via App and Smart Speaker (Alexa, Siri, Google Assistant), Save Heating Costs, DIY Installation 49 mm x 67 mm x 67 mm X 1x Add-on Radiator Thermostat

tado

° Smart Radiator Thermostat X, Temperature Control via App and Smart Speaker (Alexa, Siri, Google Assistant), Save Heating Costs, DIY Installation 49 mm x 67 mm x 67 mm X 1x Add-on Radiator Thermostat

  • Stable and precise room-by-room temperature control once configured
  • Rechargeable battery with roughly one charge per heating season
  • Integrates well with Matter/Thread and smart speakers (Alexa, Google, Siri)
Overall, the tado° Smart Radiator Thermostat X is a solid smart valve that does what it claims, as long as you’re the right kind of user. If you already have a Matter/Thread setup at home and you want proper room-by-room control without rewiring your heating system, it fits in nicely. The hardware feels solid, the regulation is stable once you’ve tweaked the temperature offset, and the app and smart speaker control make daily use simple. Battery life is good enough that charging it once per season isn’t a big drama.Where it falls short is mainly around ecosystem and cost. It’s not compatible with older tado systems, so anyone already invested in V3+ gear will feel rightly annoyed. On top of the price of the valve itself, you may need a Bridge X or other Thread border router, maybe another Matter device for a stronger mesh, and possibly the AI Assist subscription if you want all the automation they advertise. That pushes the real cost up, especially if you’re doing a whole-home setup.I’d recommend this to people who are already comfortable with smart home tech, who plan to control several rooms, and who are okay paying a bit more upfront for more comfort and some energy savings over time. If you just want a simple cheap way to turn a single radiator up and down, or if you’re already on an older tado system, this is probably not the smartest place to put your money right now.
8.1 /10
★★★★★ ★★★★★
🌟 Excellent See full review →
See offer Amazon
#4
WiFi thermostat for Boiler Heating Smart Thermostat for Combi Boiler Compatible with Tuya app, 2-Wire Programmable Digital Wireless Thermostat with Voice Control, Battery-powered R9V

BEOK CONTROLS

WiFi thermostat for Boiler Heating Smart Thermostat for Combi Boiler Compatible with Tuya app, 2-Wire Programmable Digital Wireless Thermostat with Voice Control, Battery-powered R9V

  • Easy upgrade from a basic 2‑wire thermostat to Wi‑Fi without touching mains wiring
  • Works with Tuya / Smart Life, Alexa and Google Assistant for remote and voice control
  • Good price for basic smart features like scheduling and app control
Overall, the BEOK CONTROLS WiFi thermostat is a practical budget upgrade if you’re starting from a basic 2‑wire wall thermostat and just want app control and scheduling without touching mains wiring. It does the core job: it controls the boiler reliably enough, works with Tuya / Smart Life, and integrates with Alexa and Google Assistant. The installation is fairly simple, and for the price, you get a decent set of features.On the flip side, you clearly feel the cost savings. The plastic and screen are basic, the lack of backlight is annoying, the terminals and back box are a bit tight for thicker cables, and the Wi‑Fi can be flaky in some setups. The thermostat is also quite heavy on batteries if you keep Wi‑Fi enabled, so you need to accept regular AA changes. It’s not a polished product; it’s a functional one.I’d recommend it to people who are comfortable with basic DIY, already use Tuya/Smart Life, and want a cheap, no‑frills smart thermostat for a combi boiler or dry contact boiler. If you want rock‑solid Wi‑Fi, a nicer interface, long battery life, or a “set and forget” premium feel, you should probably skip this and look at a better‑known brand, even if it costs more. This one is fine if your priority is saving money and you don’t mind a few compromises.
6 /10
★★★★★ ★★★★★
👌 Good See full review →
See offer Amazon

Comparison table : Smart thermostats with app control

Overall score Value for money Design Battery Durability Performance Presentation
Smart Thermostat X – Starter Kit Wired Room Thermostat & Bridge X, Control via App & Smart Speaker (Alexa, Siri, Google Assistant), DIY Installation X Starter Kit: Wired Heating Starter Kit
#1 tado
Smart Thermostat X – Starter Kit Wired R...
See offer Amazon
8.3/10 ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★
Beok Smart Thermostat for Combi Boiler, Wifi thermostat 2-Wire for Boiler Heating Compatible with Tuya app, Programmable Digital with Voice Control, Battery-powered Surface Mount White
#2 BEOK CONTROLS
Beok Smart Thermostat for Combi Boiler,...
See offer Amazon
8.1/10 ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★
° Smart Radiator Thermostat X, Temperature Control via App and Smart Speaker (Alexa, Siri, Google Assistant), Save Heating Costs, DIY Installation 49 mm x 67 mm x 67 mm X 1x Add-on Radiator Thermostat
#3 tado
° Smart Radiator Thermostat X, Temperatu...
See offer Amazon
8.1/10 ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★
WiFi thermostat for Boiler Heating Smart Thermostat for Combi Boiler Compatible with Tuya app, 2-Wire Programmable Digital Wireless Thermostat with Voice Control, Battery-powered R9V
#4 BEOK CONTROLS
WiFi thermostat for Boiler Heating Smart...
See offer Amazon
6/10 ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★ ★★★★★

Frequently asked questions

According to our tests, the best smart thermostats with app control is the Smart Thermostat X – Starter Kit Wired Room Thermostat & Bridge X, Control via App & Smart Speaker (Alexa, Siri, Google Assistant), DIY Installation X Starter Kit: Wired Heating Starter Kit with a score of 8.3/10.

The cheapest smart thermostats with app control in our comparison is the Beok Smart Thermostat for Combi Boiler, Wifi thermostat 2-Wire for Boiler Heating Compatible with Tuya app, Programmable Digital with Voice Control, Battery-powered Surface Mount White.

The most popular smart thermostats with app control is the Smart Thermostat X – Starter Kit Wired Room Thermostat & Bridge X, Control via App & Smart Speaker (Alexa, Siri, Google Assistant), DIY Installation X Starter Kit: Wired Heating Starter Kit with 2 567 customer reviews.

To choose a smart thermostats with app control, we recommend comparing performance, build quality, value for money and user reviews. Our comparison table above helps you make the right choice.

We have tested 4 Smart thermostats with app control to establish this ranking.
#1 Smart Thermostat X – Starter Kit Wired Room Thermostat & Bridge X, Control via App & Smart Speaker (Alexa, Siri, Google Assistant), DIY Installation X Starter Kit: Wired Heating Starter Kit
tado
Smart Thermostat X Wired Starter Kit
8.3/10 Best choice
See offer Amazon