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| Feature | iRobot Roomba Plus 505 | Roborock Saros 20 | Winner |
|---|---|---|---|
| Price | $695.00 | $1479.99 | iRobot Roomba Plus 505 |
| Battery Life | 180 minutes | 200 minutes | Roborock Saros 20 |
| Suction Power | 7000Pa | 36000Pa | Roborock Saros 20 |
| Rating | 4.2 | 4.2 | Tie |
| Warranty | 1 year | 1 year | Tie |
| Auto Recharge | YES | YES | Tie |
| Connectivity | 2.4 GHz WiFi, 5 GHz WiFi, Bluetooth | 2.4 GHz WiFi, 5 GHz WiFi | Tie |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Tie |
| Navigation Type | Laser (LiDAR) | Laser (LiDAR) | Tie |
| Obstacle Detection | YES | YES | Tie |
| Cliff Detection | YES | YES | Tie |
| Multi-Room Mapping | YES | YES | Tie |
What the differences mean
Suction
The Roborock Saros 20 is rated at 36,000 Pa. The iRobot Roomba Plus 505 is rated at 7,000 Pa. That is not a rounding gap. On a thick rug with pet hair ground in, the Roborock number is the reason the sheet picks it. Both still lift the mop, wash it, dry it and empty the bin, so the dock chores are shared.
Height and runtime
The Roborock Saros 20 is 79.8 mm tall and rated for 200 minutes, charging in about 2.5 hours. The iRobot Roomba Plus 505 is 106 mm tall and rated for 180 minutes, charging in about 4.5 hours. Twenty minutes of runtime is modest. The height and the charge time are what you feel: more furniture cleared, and a faster return after a top-up.
Hot water and the tank
Roborock Saros 20 owners describe dual spinning mops washed at 212 F, and the robot carries a 4 L water system with automatic detergent. The iRobot Roomba Plus 505 washes and dries the mop and lifts it, and it does not list an automatic detergent dispenser. If hot water is the reason you trust a mop, the Roborock is the one whose owners name a temperature.
What they share
Both support Alexa, Google Home, Apple Home, SmartThings, Home Assistant and Matter, and both support 5 GHz Wi-Fi. Smart home is not a reason to separate them. Separate them on suction and height instead. The Roborock Saros 20 also lists 63 dB, and its owners call overnight runs comfortable, which is a different claim from the Plus 505 dock cycle owners call loud.
Which one to buy if
- thick rugs hold pet hair the last robot left behind
The Roborock Saros 20 is rated at 36,000 Pa against 7,000 Pa on the iRobot Roomba Plus 505, with a dock that still washes the mop.
- the sofa is too low for a taller robot
At 79.8 mm, the Roborock Saros 20 slides under furniture the 106 mm iRobot Roomba Plus 505 has to route around.
- you want a washed mop without the flagship suction
The iRobot Roomba Plus 505 still self-empties and washes and dries the mop, with Apple Home and Matter, at the lower price.
- overnight runs should stay reasonably quiet
Roborock Saros 20 owners call it quiet enough for overnight, and the sheet lists 63 dB. Plus 505 owners instead call the dock cycle louder than they expected.
- + Price: $695.00
- - Battery Life: 180 minutes vs 200 minutes
- - Suction Power: 7000Pa vs 36000Pa
- + Battery Life: 200 minutes
- + Suction Power: 36000Pa
- - Price: $1479.99 vs $695.00
What owners say
Owners of both like a dock that empties and washes, then they notice different kinds of power. iRobot Roomba Plus 505 owners praise fast LiDAR maps, pet-hair pickup on carpet and hard floors, and obstacle avoidance around cords, while they say the dock cycle is loud and some units develop navigation or bumper-stuck errors after a few months. Roborock Saros 20 owners single out very high suction on embedded dust, a slim body under sofas, quiet overnight runs, and hot-water mop washing, and they complain that detergent is an extra purchase, threshold climbing can be inconsistent, deep-clean runs drain the battery faster, and the mop will not automatically re-scrub a still-dirty patch.
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 Plus 505
- Roborock Saros 20
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Frequently Asked Questions
Which is better overall: iRobot Roomba Plus 505 or Roborock Saros 20?
The Roborock Saros 20. It has 36,000 Pa against 7,000 Pa, 200 minutes against 180, and a 79.8 mm body against 106 mm, with hot-water mop washing. The iRobot Roomba Plus 505 is the more affordable robot that still empties, washes and dries a mop and supports Apple Home and Matter.
What is the biggest difference between the iRobot Roomba Plus 505 and the Roborock Saros 20?
Suction. The Roborock Saros 20 is rated at 36,000 Pa and the iRobot Roomba Plus 505 at 7,000 Pa. The Roborock is also shorter, at 79.8 mm against 106 mm, and charges in about 2.5 hours against 4.5. Both mop, self-empty and support Matter.
Do the iRobot Roomba Plus 505 and the Roborock Saros 20 both mop?
Yes. Both mop, lift the mop on carpet, and use a dock that washes, dries and empties. The Roborock Saros 20 adds a 4 L water system, automatic detergent and owner reports of 212 F washing. The iRobot Roomba Plus 505 does not list an automatic detergent dispenser.
Which is better under a low sofa?
The Roborock Saros 20, at 79.8 mm tall, against 106 mm for the iRobot Roomba Plus 505. Both use LiDAR and obstacle detection. Height is what decides whether the space under the sofa is cleaned or skipped.
Who should buy the Roborock Saros 20?
Homes with thick rugs, pet hair and low furniture that want 36,000 Pa, a hot-water mop and Matter or Apple Home, and that can accept a flagship robot.
Who should buy the iRobot Roomba Plus 505?
Buyers who want the bin emptied and the mop washed, with Apple Home and 5 GHz Wi-Fi, and who do not need 36,000 Pa or a sub-80 mm body.
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