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Google Nest Learning Thermostat 4th Gen vs iRobot Roomba j9+

Detailed comparison of Google Nest Learning Thermostat 4th Gen and iRobot Roomba j9+. Compare specs, price, pros & cons to find which is best for you.

AI Recommended

Quick Verdict

The Google Nest Learning Thermostat 4th Gen is our top pick with a 4.4★ rating (4,560 reviews). Standout strength: learns your habits. The iRobot Roomba j9+ counters with excellent obstacle avoidance. Price difference: £480.

Full Spec Comparison

Google

Google Nest Learning Thermostat 4th Gen

£219
VS
iRobot

iRobot Roomba j9+

£699
Rating
★★★★4.4
★★★★4.4
Reviews
4,560
5,670
Brand
Google
iRobot
display
2.7" LCD edge-to-edge
—
sensors
Temperature, humidity, occupancy, ambient light
—
features
Learning schedule, Home/Away, Energy History
Auto-empty, obstacle avoidance, smart mapping
connectivity
Wi-Fi, Bluetooth, Thread, Matter
Wi-Fi, Alexa, Google
compatibility
Google Home, Alexa
—
installation
DIY or pro install
—
suction
—
100% more suction than j7+
navigation
—
PrecisionVision (front camera)
battery
—
120 minutes
cleaning
—
3-stage with dual rubber brushes
Pros
Learns your habitsSaves on energy billsBeautiful new displayMatter/Thread ready
Excellent obstacle avoidanceAuto-empty is hands-freeGreat for pet ownersSmart mapping
Cons
Expensive for a thermostatMay need professional installNot all HVAC systems compatibleGoogle ecosystem preferred
Very expensiveSubscription for full featuresLoud auto-emptyNo mopping

Check Price on Amazons

GoogleAI VerifiedAI Verified

Google Nest Learning Thermostat 4th Gen

★★★★4.4(4,560 reviews)
from£219$279
display2.7" LCD edge-to-edge
sensorsTemperature, humidity, occupancy, ambient light
featuresLearning schedule, Home/Away, Energy History
Learns your habitsSaves on energy bills
Expensive for a thermostat
Affiliate link
iRobotAI VerifiedAI Verified

iRobot Roomba j9+

★★★★4.4(5,670 reviews)
from£699$799
suction100% more suction than j7+
navigationPrecisionVision (front camera)
featuresAuto-empty, obstacle avoidance, smart mapping
Excellent obstacle avoidanceAuto-empty is hands-free
Very expensive
Affiliate link

Frequently Asked Questions

Which is better: Google Nest Learning Thermostat 4th Gen or iRobot Roomba j9+?

The Google Nest Learning Thermostat 4th Gen edges ahead with a 4.4★ rating vs 4.4★.Learns your habits. However, the iRobot Roomba j9+ wins on excellent obstacle avoidance. Your best choice depends on whether you prioritise smart-home or cleaning.

Is the Google Nest Learning Thermostat 4th Gen worth it over the iRobot Roomba j9+?

The Google Nest Learning Thermostat 4th Gen costs £219 while the iRobot Roomba j9+ is £699. The Google Nest Learning Thermostat 4th Gen is the better value option. Both are excellent for smart-home and energy-saving.

Google Nest Learning Thermostat 4th Gen vs iRobot Roomba j9+ — which should I buy in 2026?

Choose the Google Nest Learning Thermostat 4th Gen if you prioritise learns your habits. Choose the iRobot Roomba j9+ if you prioritise excellent obstacle avoidance. Both are top-rated in the smart-home category.

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