iRobot Roomba j9+ (Black)
2023
Nest Learning Thermostat (4th gen) (Black)
2024
Nest Learning Thermostat (4th gen) (Black) takes it — here’s why.
In our weighted Specdex score, iRobot Roomba j9+ (Black) lands at 85 and Nest Learning Thermostat (4th gen) (Black) at 92. That puts Nest Learning Thermostat (4th gen) (Black) ahead by 7 points — a decisive margin driven mostly by its strengths in the categories below.
Pick iRobot Roomba j9+ (Black) if…
- ✓Matter/Thread support (modern SKUs)
- ✓App-based setup
- ✓Works with major voice assistants
Pick Nest Learning Thermostat (4th gen) (Black) if…
- ✓Matter/Thread support (modern SKUs)
- ✓App-based setup
- ✓Works with major voice assistants
Score breakdown
Specs side-by-side
| Spec | iRobot Roomba j9+ (Black) | Nest Learning Thermostat (4th gen) (Black) |
|---|---|---|
| Release year | 2023 | 2024 |
| Color | Black | Black |
iRobot Roomba j9+ (Black)
- +Matter/Thread support (modern SKUs)
- +App-based setup
- +Works with major voice assistants
- −Subscription sometimes required
- −Cloud dependency on many
- −Ecosystem lock-in
Nest Learning Thermostat (4th gen) (Black)
- +Matter/Thread support (modern SKUs)
- +App-based setup
- +Works with major voice assistants
- −Subscription sometimes required
- −Cloud dependency on many
- −Ecosystem lock-in
FAQ: iRobot Roomba j9+ (Black) vs Nest Learning Thermostat (4th gen) (Black)
Which is better, iRobot Roomba j9+ (Black) or Nest Learning Thermostat (4th gen) (Black)? +
Nest Learning Thermostat (4th gen) (Black) scores 92 on our weighted rubric — ahead by 7. Your best pick depends on the sub-scores above.
Is iRobot Roomba j9+ (Black) worth the price? +
At $899, iRobot Roomba j9+ (Black) delivers a Specdex score of 85 — strongest in ecosystem.
Is Nest Learning Thermostat (4th gen) (Black) worth the price? +
At $280, Nest Learning Thermostat (4th gen) (Black) delivers a Specdex score of 92 — strongest in ecosystem.
Does iRobot Roomba j9+ (Black) or Nest Learning Thermostat (4th gen) (Black) last longer? +
Based on our long-term update and support ratings, both ship with multi-year support. Battery and reliability scores are visible in the breakdown above.