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Robot Vacuums · Head to head

iRobot Roomba 705X vs iRobot Roomba Plus 515 Combo Robot + AutoWash Dock

Full Robot Vacuums comparison in 2026

Updated October 2026
Data from Amazon and official iRobot site.
2026 verdict
The cheaper half of this iRobot pairing is not the compromise: the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock wins this robot vacuum comparison on battery life and suction over the iRobot Roomba 705X.
iRobot Roomba Plus 515 Combo Robot + AutoWash Dock
Winner
iRobot Roomba Plus 515 Combo Robot + AutoWash Dock
$599.99$699.9914% OFF

Last recorded price

It runs 200 minutes per charge against 120 and is rated at 22000Pa against 13000Pa, and it is the lower priced of the two. The iRobot Roomba 705X answers with the broader platform list, adding Apple Home, SmartThings, Home Assistant and Matter plus 5 GHz Wi-Fi, where the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock stays on Google Home and Alexa. Both mop with a dock that washes, dries and lifts the mop and empties the bin, and only the 705X dispenses detergent automatically. Choose the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock for runtime and suction at a lower price, and the iRobot Roomba 705X for its smart home reach.
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FeatureiRobot Roomba 705XiRobot Roomba Plus 515 Combo Robot + AutoWash DockWinner
Rating4.34.2iRobot Roomba 705X
Battery Life120 minutes200 minutesiRobot Roomba Plus 515 Combo Robot + AutoWash Dock
Connectivity2.4 GHz WiFi, 5 GHz WiFi, Bluetooth2.4 GHz WiFi, BluetoothiRobot Roomba 705X
IntegrationsGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, AlexaiRobot Roomba 705X
Suction Power13000Pa22000PaiRobot Roomba Plus 515 Combo Robot + AutoWash Dock
Warranty1 year1 yearTie
Auto RechargeYESYESTie
Navigation TypeLaser (LiDAR)Laser (LiDAR)Tie
Obstacle DetectionYESYESTie
Cliff DetectionYESYESTie
Multi-Room MappingYESYESTie
No-Go ZonesYESYESTie

What the differences mean

Battery life

The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock is rated for 200 minutes per charge against 120 on the iRobot Roomba 705X, a gap that shows up on any larger floor plan in a single run.

Rated suction

iRobot lists 22000Pa for the Roomba Plus 515 Combo Robot + AutoWash Dock and 13000Pa for the Roomba 705X, so the mid-range model actually has the stronger rated motor.

Smart home reach

The iRobot Roomba 705X adds 5 GHz Wi-Fi and Apple Home, SmartThings, Home Assistant and Matter. The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock stays on Google Home and Alexa over 2.4 GHz.

Detergent

The iRobot Roomba 705X dispenses cleaning solution automatically at the dock. The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock is detergent compatible but the solution is added to the tank by hand.

Height and price

At 84 mm the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock is slimmer than the 105 mm iRobot Roomba 705X, and it is the lower priced of the two, so it also wins on reach and cost.

Which one to buy if

Prime exclusive deal

Last recorded priceOct 6, 2026$699.99

Currently unavailable on Amazon USA
  • + Rating: 4.3
  • + Connectivity: 2.4 GHz WiFi, 5 GHz WiFi, Bluetooth
  • + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
  • - Battery Life: 120 minutes vs 200 minutes
  • - Suction Power: 13000Pa vs 22000Pa

What owners say

Owners of the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock lead with the vacuuming: 22000Pa that lifts pet hair off wood, tile, vinyl and low rugs, an accurate LiDAR map, and a battery that covers a full floor before it returns to recharge. They appreciate the AutoWash dock for emptying the bin and heat-drying the mop pads, and the app for room selection and no-go zones. Their warnings are about mopping, which they rate only decent, the round pads that can snag on cords or pop off, a dirty water tank that smells if not emptied promptly, and a loud self-emptying cycle. Many also mention the 2.4 GHz-only setup as the first hurdle, and a handful returned the unit over the connection alone.

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • iRobot Roomba 705X
  • iRobot Roomba Plus 515 Combo Robot + AutoWash Dock

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Frequently Asked Questions

Which is better overall: the iRobot Roomba 705X or the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock?

The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock is the better robot vacuum overall, leading on battery life, suction and price. The iRobot Roomba 705X stays in the conversation on integrations.

What is the biggest difference between the iRobot Roomba 705X and the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock?

Runtime and reach. The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock is rated for 200 minutes against 120 on the iRobot Roomba 705X and is slimmer at 84 mm, while the 705X is the one that reaches Apple Home and Matter.

Which robot vacuum runs longer, the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock or the iRobot Roomba 705X?

The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock is listed at 200 minutes and the iRobot Roomba 705X at 120 minutes.

Who should buy the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock?

Mixed hard floor and carpet homes and buyers who want strong daily vacuuming, a self-emptying dock and the longest runs at the lower price.

Who should buy the iRobot Roomba 705X?

Apple Home or Matter households that want Siri control, automatic detergent dosing and 5 GHz Wi-Fi, and accept the shorter 120 minute battery.

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