Best Smart Thermostat UK (2026): Top 5 Picks
Five smart thermostats to control your heating from your phone, with a simple check for which boiler each one suits
Quick answer
- Best overalltado Wireless Smart Thermostat X Starter Kit – Heating and hot water, geofencing, 1,000+ bought last month
- Best valuetado V3+ Wireless Smart Thermostat Starter Kit – Full tado app for about £58
- Best for Apple HomeNetatmo Smart Thermostat – Apple HomeKit, Alexa and Google, Auto-Adapt
- Best budget for combi boilersMeross MTS215B Smart Thermostat – Matter support, open window detection, about £60
- Best touchscreenHoneywell Home T6 Wired Smart Thermostat (black) – Wired touchscreen, OpenTherm, geofencing
The best smart thermostat UK homes can pick for most boilers is the tado Wireless Smart Thermostat X Starter Kit. It controls heating and hot water, works with gas boilers and heat pumps, has geofencing that turns the heating down when everyone leaves, and can spot an open window. It had more than 1,000 bought in the past month on Amazon UK when we checked, for about £130. On a budget, the older tado V3+ Starter Kit was about £58 with 4.5 stars.
A smart thermostat lets you set schedules and change the heating from your phone, so you only heat the house when you need to. How much you save depends on your home and habits, so treat maker savings claims as a best case. Before you buy, check your boiler type: some thermostats here only work with combi boilers. We compared five Amazon UK picks on boiler fit, hot water control, features and price. Want quick wins first? See our draught proofing savings calculator. We have not tested these ourselves.
1K+
The tado Wireless Smart Thermostat X Starter Kit showed more than 1,000 bought in the past month on Amazon UK when we checked
Source: Amazon UK listing badge, checked 10 October 2026
Editor's Choice
tado Wireless Smart Thermostat X Starter Kit
Our top pick. The most complete kit here, and easy to grow into room-by-room heating.
Diagnose your problem
How to Choose a Smart Thermostat
Four quick questions to find the right one.
Problem
Do you have a hot water tank?
System and regular boilers need hot water control
Problem
Which smart home do you use?
Alexa, Google or Apple Home
Problem
Fitting it yourself?
Wireless kits are usually easier to swap in
Problem
Want to spend under £70?
You just want app control and schedules
Our Top 5 Picks
Compare all
tado
tado Wireless Smart Thermostat X Starter Kit
“Our top pick. The most complete kit here, and easy to grow into room-by-room heating.”
Best for
Most UK homes with a gas boiler or heat pump
Skip it if
You only want simple app control for a combi boiler at the lowest price.
Pros
- +More than 1,000 bought in the past month
- +Heating and hot water control
- +Works with Alexa, Google and Siri
- +Room-by-room control if you add radiator thermostats
Cons
- −About £130
- −Some automatic features need a paid tado subscription
- −Only about 290 reviews
All specifications
| Boiler type | Combi, system, heat pump |
| Hot water control | Yes |
| Works with | Alexa, Google, Siri |
| Fitting | Wireless, DIY (listing says) |
tado
tado V3+ Wireless Smart Thermostat Starter Kit
“The best value pick. Most of what the newer tado X does, for less than half the price.”
Best for
Budget buyers who still want hot water control and a proven app
Skip it if
You plan to build a full tado X system later.
Pros
- +About £58 when we checked
- +Highest star rating here, at 4.5
- +Hot water control
- +More than 500 bought in the past month
Cons
- −Older generation than tado X
- −Auto turn-down needs a paid add-on
- −Not compatible with the newer tado X range
All specifications
| Boiler type | Combi and system |
| Hot water control | Yes |
| Works with | Alexa, Google |
| Fitting | Wireless, DIY (listing says) |
Netatmo
Netatmo Smart Thermostat
“The best pick for Apple Home users, with no subscription.”
Best for
Apple Home users with a combi boiler
Skip it if
You have a hot water tank and need hot water control.
Pros
- +Over 1,700 reviews
- +Apple HomeKit, Alexa and Google
- +Auto-Adapt for outdoor temperature
- +No subscription mentioned
Cons
- −Lower 4.1 star rating
- −Hot water control not listed
- −Not compatible with the newer Netatmo Original range
All specifications
| Boiler type | Combi (check maker) |
| Hot water control | Not listed |
| Works with | Apple Home, Alexa, Google |
| Fitting | DIY, under an hour (listing says) |
Meross
Meross MTS215B Smart Thermostat
“The best budget pick for combi boilers, with Matter for future smart homes.”
Best for
Combi boiler homes that want Matter and a low price
Skip it if
You have a hot water cylinder.
Pros
- +About £60 when we checked
- +Matter, Apple Home, Alexa and Google
- +Open window detection
- +Energy reports in the app
Cons
- −Combi and wet systems only, no hot water control
- −Lowest rating here, at 4.0
- −Wired fit
All specifications
| Boiler type | Combi, wet underfloor |
| Hot water control | No |
| Works with | Matter, Apple Home, Alexa, Google |
| Fitting | Wired |
Honeywell Home
Honeywell Home T6 Wired Smart Thermostat (black)
“The best pick if you want a smart thermostat that is also easy to use on the wall.”
Best for
Homes where not everyone wants to use an app
Skip it if
You want a cheap, DIY wireless kit.
Pros
- +Large touchscreen
- +OpenTherm support
- +Over 1,000 reviews
- +Alexa, Google and Apple
Cons
- −Most expensive pick, about £171
- −Wired fit, often needs an installer
- −Hot water control not listed in this kit
All specifications
| Boiler type | Combi, on/off and OpenTherm, heat pump |
| Hot water control | Not listed |
| Works with | Alexa, Google, Apple |
| Fitting | Wired, installer advised |
Compare All Products
Side-by-side specs for quick decision-making
Swipe to compare →
| Product | Boiler type | Hot water control | Works with | Fitting | Price | Best For | Action |
|---|---|---|---|---|---|---|---|
 tado Wireless Smart Thermostat X Starter KitBest Overall | Combi, system, heat pump | Yes | Alexa, Google, Siri | Wireless, DIY (listing says) | £120 to £135 | Most UK homes with a gas boiler or heat pump | View |
| Combi and system | Yes | Alexa, Google | Wireless, DIY (listing says) | £55 to £65 | Budget buyers who still want hot water control and a proven app | View | |
 Netatmo Smart ThermostatBest for Apple Home | Combi (check maker) | Not listed | Apple Home, Alexa, Google | DIY, under an hour (listing says) | £80 to £90 | Apple Home users with a combi boiler | View |
 Meross MTS215B Smart ThermostatBest Budget for Combi Boilers | Combi, wet underfloor | No | Matter, Apple Home, Alexa, Google | Wired | £55 to £65 | Combi boiler homes that want Matter and a low price | View |
 Honeywell Home T6 Wired Smart Thermostat (black)Best Touchscreen | Combi, on/off and OpenTherm, heat pump | Not listed | Alexa, Google, Apple | Wired, installer advised | £160 to £175 | Homes where not everyone wants to use an app | View |
Fitting a Smart Thermostat Safely
Most smart thermostats connect to mains wiring at the boiler or wiring centre. Turn off the power before you start, and if you are not confident, use a qualified electrician or heating engineer. Never open the gas parts of your boiler: only a Gas Safe registered engineer can work on those. Check your boiler type and the maker compatibility checker before you buy. Keep a carbon monoxide alarm near any gas boiler.
Research Methodology
How We Chose These Products
We have not tested these ourselves. This is desk research focused on smart thermostats sold on Amazon UK.
We read Amazon UK listings and verified UK buyer reviews, and compared maker specs (boiler compatibility, hot water control, app features, smart home support and fitting). We checked stock, prices and "bought in past month" badges on Amazon UK with a UK postcode on 10 October 2026. We never make up prices or test results.
Selection Criteria
Boiler Fit
30% weightCombi, system and heat pump support, plus hot water
Buyer Reviews
25% weightStar rating, review count and comments on the app and fitting
Smart Features
20% weightSchedules, geofencing, open window detection and voice control
Value for Money
15% weightPrice compared with features
Availability
10% weightIn stock on Amazon UK when we checked
Important Limitations
- •We have not fitted these ourselves
- •Savings figures are maker claims and depend on your home
- •Some features need a paid add-on, such as tado Auto Assist
- •Always check your own boiler with the maker before buying
Research last conducted: · Price bands checked:
Frequently Asked Questions
Common questions about smart thermostats in the UK
For most homes we pick the tado Wireless Smart Thermostat X Starter Kit. It controls heating and hot water, has geofencing and open window detection, and was about £130 when we checked. Choose the tado V3+ for value, the Netatmo for Apple Home, the Meross for a cheap combi option, or the Honeywell T6 for a touchscreen.
They can, by heating your home only when you need it. Savings depend on your home, insulation and habits, and maker figures are best cases. Try our heating cost calculator to see what your heating costs now.
Most work with UK gas combi and system boilers, but not all control hot water. Check whether you have a hot water tank, and use the maker compatibility checker before you buy.
A combi boiler heats water on demand, so you only need heating control. A system or regular boiler has a hot water tank, so you need a thermostat that also controls hot water, like the tado kits here.
Many people do, especially wireless kits. It usually means mains wiring, so turn the power off first. If you are not confident, use a qualified electrician or heating engineer. Never open the gas side of your boiler.
Most do not. tado sells an optional paid Auto Assist add-on for automatic turn-down, but the app, schedules and remote control work without it.
OpenTherm lets a thermostat tell the boiler exactly how much heat is needed, rather than just on or off. This can help a boiler run more efficiently. The tado X and Honeywell T6 list OpenTherm support.
Some do. The tado X and Honeywell T6 listings mention heat pumps. Check with your installer, as heat pumps work best with long, steady heating.
Yes, with smart radiator thermostats added to the system. tado sells radiator thermostats that work with the tado X kit for room-by-room heating.
Stop draughts and keep heat in first. See our best draught excluders UK, best thermal curtains UK and best radiator reflector foil UK guides.
Ready to control your heating from your phone?
Our top pick, the tado Wireless Smart Thermostat X Starter Kit, controls heating and hot water and showed over 1,000 bought in the past month when we checked.
View Our Top Pick on Amazon UKDisclosure & Editorial Policy
Amazon Affiliate: TopMagpie is a participant in the Amazon Services LLC Associates Programme. We earn from qualifying purchases. This doesn't affect our editorial choices or the prices you pay.
No Lab Testing: We have not laboratory-tested these products. Recommendations are based on spec analysis, reviews, and editorial judgement.
Prices: Approximate bands, checked . Amazon prices change frequently – always verify the current price before purchasing. We do not invent live prices.
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