Robot Vacuums · Head to head

iRobot Roomba 505X vs iRobot Roomba Plus 505

Full Robot Vacuums comparison in 2026

Updated October 2026
Data from the official iRobot site.
2026 verdict
505X or Plus 505, does the name change the robot?
iRobot Roomba 505X
Winner
iRobot Roomba 505X
$769.95$999.9923% OFF
Buy on Amazon USA
Barely, so the iRobot Roomba 505X takes this robot vacuum and mop pairing simply because it is usually the lower priced listing. Both share the same LiDAR mapping with obstacle avoidance, spinning mop pads that lift over carpet, an AutoWash dock that self-empties and washes and heat-dries the pads, a rated 180 minutes of battery, dual-band Wi-Fi and Matter support for Apple Home, SmartThings, Home Assistant, Alexa and Google Home. The catalog lists 7000Pa of suction and the dock size only for the iRobot Roomba Plus 505, which reads as a documentation gap rather than a hardware one, since the robots measure and weigh the same. Buy whichever of the two is cheaper when you shop, which is most often the iRobot Roomba 505X.
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FeatureiRobot Roomba 505XiRobot Roomba Plus 505Winner
Price$769.95$684.99iRobot Roomba Plus 505
Rating4.24.2Tie
Warranty1 year1 yearTie
Battery Life180 minutes180 minutesTie
Auto RechargeYESYESTie
Connectivity2.4 GHz WiFi, 5 GHz WiFi, Bluetooth2.4 GHz WiFi, 5 GHz WiFi, BluetoothTie
IntegrationsGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterTie
Navigation TypeLaser (LiDAR)Laser (LiDAR)Tie
Obstacle DetectionYESYESTie
Cliff DetectionYESYESTie
Multi-Room MappingYESYESTie
No-Go ZonesYESYESTie

What the differences mean

Model number

The iRobot Roomba 505X is model N184020 and the iRobot Roomba Plus 505 is N185020. The robots measure 358 x 351 mm and 357 x 351 mm and weigh about 4.3 kg each, so physically they are the same machine.

Documented specs

Suction power (7000Pa) and dock dimensions are published only for the iRobot Roomba Plus 505. For the iRobot Roomba 505X they are simply not documented, so this is not a real advantage for either one.

Price

With matching hardware, the price is what separates them, and the iRobot Roomba 505X is usually the cheaper of the two.

Which one to buy if

What owners say

Owners of both Roombas praise the same things: fast, accurate LiDAR mapping, strong pickup of pet hair across hard floors and carpet, and an AutoWash dock that empties the bin and washes and dries the mop pads with little help. Both groups also name noise as the main drawback, especially during deep-clean runs and the dock's own wash cycle, so many schedule it for when they are out. iRobot Roomba 505X owners add that initial Wi-Fi pairing and mapping can take a reset or two and that dark floors can confuse the cliff sensors. iRobot Roomba Plus 505 owners mention bumper-stuck or docking errors appearing after a few months, a roller that traps some hair, and advise buying from an authorized seller to keep warranty support simple.

Frequently Asked Questions

What is the difference between the iRobot Roomba 505X and the iRobot Roomba Plus 505?

In practice, only the model number and the listing. The iRobot Roomba 505X and the iRobot Roomba Plus 505 share the same size, battery, LiDAR navigation, mop system, AutoWash dock and smart home support.

Which is better overall: iRobot Roomba 505X or iRobot Roomba Plus 505?

Neither is better as a machine. The iRobot Roomba 505X wins because it is usually the lower priced of the two; if the iRobot Roomba Plus 505 is cheaper on the day, buy that one.

Do the iRobot Roomba 505X and the iRobot Roomba Plus 505 mop?

Yes, both. They use spinning mop pads that lift over carpet, and the AutoWash dock washes and heat-dries the pads and empties the robot's bin.

Do the iRobot Roomba 505X and the iRobot Roomba Plus 505 work with Apple Home?

Yes. Both support Matter, which brings them into Apple Home and SmartThings, and they also work with Home Assistant, Alexa and Google Home over 2.4 or 5 GHz Wi-Fi.

Who should buy the iRobot Roomba 505X or the iRobot Roomba Plus 505?

Pet owners and busy households with mixed hard floors and carpet who want vacuuming and mopping in one run and a dock that handles the upkeep, and who can schedule the noisy cycles for when they are out.

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