Updated November 2026
Data from the official iRobot site.
2026 verdict
Suction carries this one: the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock is the stronger robot vacuum of the pair.
It is rated at 22,000Pa against 7,000Pa on the iRobot Roomba Plus 505 and for 200 minutes per charge against 180, and its 84 mm body slips under beds and sofas that the taller Plus 505 cannot reach. Both robots share the AutoWash Dock that empties the bin and washes and heat-dries the mop pads. The Plus 505 answers with the smart home side, adding dual-band Wi-Fi and Matter for Apple Home, SmartThings and Home Assistant, where the Roomba Plus 515 Combo is 2.4GHz with Alexa and Google Home only. Pick the Roomba Plus 515 Combo for suction, battery and a low profile, and the iRobot Roomba Plus 505 if Matter and Apple Home are the priority.
Connectivity
- Wi-Fi 2.4/5 GHz
- Bluetooth
vs
Winner
39% OFF
$429.00
$699.99
Works with
Connectivity
- Wi-Fi 2.4 GHz
- Bluetooth
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The biggest differences
Where these two are furthest apart, and by how much.
- Suction Power3.1×iRobot Roomba Plus 515 Combo Robot + AutoWash Dock22000Pa vs 7000Pa
- Battery Life+11%iRobot Roomba Plus 515 Combo Robot + AutoWash Dock200 minutes vs 180 minutes
| Feature | iRobot Roomba Plus 505 | iRobot Roomba Plus 515 Combo Robot + AutoWash Dock | Winner |
|---|---|---|---|
| Price | $674.99 | $429.00 | iRobot Roomba Plus 515 Combo Robot + AutoWash Dock |
| Rating | 3.3 | 3.7 | iRobot Roomba Plus 515 Combo Robot + AutoWash Dock |
| Battery Life | 180 minutes | 200 minutes | iRobot Roomba Plus 515 Combo Robot + AutoWash Dock |
| Connectivity | 2.4 GHz WiFi, 5 GHz WiFi, Bluetooth | 2.4 GHz WiFi, Bluetooth | iRobot Roomba Plus 505 |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Google Home, Alexa | iRobot Roomba Plus 505 |
| Suction Power | 7000Pa | 22000Pa | iRobot Roomba Plus 515 Combo Robot + AutoWash Dock |
| Warranty | 1 year | 1 year | Tie |
| Auto Recharge | YES | YES | 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 power
22,000Pa against 7,000Pa. The Roomba Plus 515 Combo has far the stronger motor, which owners describe as very good on wood, tile and low rugs, while the iRobot Roomba Plus 505 leans on its mapping and dock convenience.
Wi-Fi and Matter
The iRobot Roomba Plus 505 supports dual-band Wi-Fi and Matter, so it joins Apple Home, SmartThings and Home Assistant. The Roomba Plus 515 Combo is 2.4GHz only and stops at Alexa and Google Home, with no Matter, Apple Home or SmartThings.
Battery and recharge
The Roomba Plus 515 Combo is rated at 200 minutes against 180 on the iRobot Roomba Plus 505, but a full charge takes around six hours where the Plus 505 takes about 4.5, so it is idle longer between runs.
Height and access
The Roomba Plus 515 Combo is 84 mm tall and the iRobot Roomba Plus 505 about 106 mm. The low profile is the clearest everyday advantage of the 515, letting it clean under furniture the Plus 505 passes by.
Price
The Roomba Plus 515 Combo is the more affordable robot of the pair, and it pairs that price with the strongest suction, which is why the newer model takes this comparison against the iRobot Roomba Plus 505.
Which one to buy if
- you want the strongest suction of the pair
The Roomba Plus 515 Combo is rated at 22,000Pa against 7,000Pa on the iRobot Roomba Plus 505, the bigger reserve for carpet and embedded dirt.
- your furniture leaves little floor clearance
At 84 mm the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock is over two centimetres slimmer than the Plus 505 and reaches under lower gaps.
- your smart home runs on Matter or Apple Home
The iRobot Roomba Plus 505 is Matter-enabled with dual-band Wi-Fi, reaching Apple Home, SmartThings and Home Assistant; the Roomba Plus 515 Combo supports none of those.
- you want the more affordable robot
The Roomba Plus 515 Combo costs less than the iRobot Roomba Plus 505 while offering more suction, a longer rated run and a lower body.
$674.99
- + Connectivity: 2.4 GHz WiFi, 5 GHz WiFi, Bluetooth
- + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- - Price: $674.99 vs $429.00
- - Rating: 3.3 vs 3.7
Winner
39% OFF
$429.00
$699.99
- + Price: $429.00
- + Rating: 3.7
- + Battery Life: 200 minutes
- - Connectivity: 2.4 GHz WiFi, Bluetooth vs 2.4 GHz WiFi, 5 GHz WiFi, Bluetooth
- - Integrations: Google Home, Alexa vs Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
What owners say
Owners of both Roombas agree that the AutoWash dock carries the experience, emptying the bin and washing and heat-drying the pads so weekly upkeep stays low, and both groups note their robot handles pet hair well. From there the split is clear. iRobot Roomba Plus 505 owners praise fast and accurate LiDAR mapping, the range of controls from room selection to no-go zones, and a 3L water reservoir, while they complain about a loud cleaning and dock cycle, occasional navigation errors months after purchase, and needing an authorized seller for warranty support. Owners of the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock focus on the strong suction on wood, tile and low rugs, the accurate map and the low 84 mm body, and warn that mopping is only decent, the pads can snag on cords, the dirty water tank smells if left, and the 2.4GHz setup is the most common early headache.
Upgrading from the iRobot Roomba Plus 505?
Moving from the iRobot Roomba Plus 505 to the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock buys a much stronger motor, from 7,000Pa to 22,000Pa, a slightly longer rated run and a body three centimetres lower for under-furniture access, all at a lower price. What it gives up is the smart home side: the Plus 505 is Matter-enabled over dual-band Wi-Fi, while the 515 is 2.4GHz and works with Alexa and Google Home only. If your home runs on Apple Home, SmartThings or Matter, stay on the Plus 505. If you want the bigger clean for less money and can live without Matter, the 515 is the step up.
Frequently Asked Questions
Which is better overall: iRobot Roomba Plus 505 or iRobot Roomba Plus 515 Combo Robot + AutoWash Dock?
The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock, on much higher suction, a longer rated run and a lower body at a lower price, at 22,000Pa and 200 minutes against 7,000Pa and 180 minutes on the Plus 505. The Plus 505 wins only on Matter and dual-band Wi-Fi.
What is the biggest difference between the iRobot Roomba Plus 505 and the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock?
Suction and smart home support pull the other way. The Roomba Plus 515 Combo reaches 22,000Pa against 7,000Pa, while the iRobot Roomba Plus 505 is the one with Matter and dual-band Wi-Fi for Apple Home, SmartThings and Home Assistant.
Is it worth upgrading from the iRobot Roomba Plus 505 to the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock?
Yes if suction, battery and a low body matter most, since the Roomba Plus 515 Combo more than triples the rated suction at a lower price. No if your smart home depends on Matter or Apple Home, because the Plus 505 is the only one of the two that supports them.
Do both Roombas self-empty and wash their mop pads?
Yes, the iRobot Roomba Plus 505 and the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock both sit in an AutoWash Dock that empties the bin and washes and heat-dries the mop pads.
Who should buy the iRobot Roomba Plus 505?
Buyers who need Matter, Apple Home, SmartThings or Home Assistant control, precise LiDAR mapping and no-go zones, and who do not need the strongest suction.
Who should buy the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock?
Homes that want the strongest suction of this pair for less money, a longer rated run and a low 84 mm body, and that are happy with Alexa and Google Home instead of Matter.
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