Updated October 2026
Data from the official iRobot site.
2026 verdict
The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock is both the cheaper robot and the better buy: it takes this matchup against the iRobot Roomba Max 705 on price, battery life, suction and mop care.
The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock is rated at 22,000 Pa against 13,000 and runs 200 minutes against 120, and its AutoWash dock empties the bin and washes and heat-dries the mop pads, which the vacuum-only iRobot Roomba Max 705 has none of. The iRobot Roomba Max 705 is the better connected of the two and the true Matter one, reaching Apple Home, SmartThings and Home Assistant, while the Roomba Plus 515 Combo stops at Alexa and Google Home. Choose the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock for a value combo that vacuums and mops; choose the iRobot Roomba Max 705 if you only want a vacuum and the widest smart home support.
vs
Winner
14% OFF
$599.00
$699.99
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| Feature | iRobot Roomba Max 705 | iRobot Roomba Plus 515 Combo Robot + AutoWash Dock | Winner |
|---|---|---|---|
| Price | $899.99 | $599.00 | iRobot Roomba Plus 515 Combo Robot + AutoWash Dock |
| Rating | 3.8 | 4.2 | iRobot Roomba Plus 515 Combo Robot + AutoWash Dock |
| Battery Life | 120 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 Max 705 |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Google Home, Alexa | iRobot Roomba Max 705 |
| Suction Power | 13000Pa | 22000Pa | iRobot Roomba Plus 515 Combo Robot + AutoWash Dock |
| Mopping Functionality | NO | YES | iRobot Roomba Plus 515 Combo Robot + AutoWash Dock |
| Auto Mop Washing | NO | YES | iRobot Roomba Plus 515 Combo Robot + AutoWash Dock |
| Auto Mop Drying | NO | YES | 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 |
What the differences mean
Mopping
The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock mops with pads that lift on carpet and are washed and dried at the dock. The iRobot Roomba Max 705 has no mopping hardware at all, no water tank and no detergent, so it is a vacuum only.
Suction power
The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock is rated at 22,000 Pa and the iRobot Roomba Max 705 at 13,000. Both use Automatic Carpet Boost, and the combo's higher figure shows on pet hair and deeper carpet.
Battery life
The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock is rated at up to 200 minutes and the iRobot Roomba Max 705 at about 120, so the combo covers more floor before it returns, though it recharges more slowly at about 6 hours.
Connectivity
The iRobot Roomba Max 705 joins 2.4 GHz and 5 GHz Wi-Fi and supports Matter, which brings it into Apple Home, SmartThings and Home Assistant. The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock is 2.4 GHz only and stops at Alexa and Google Home.
Dock
The iRobot Roomba Max 705 uses an AutoEmpty dock that only empties the bin, rated for up to 75 days. The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock steps up to an AutoWash dock that also washes and heat-dries the mop pads, at the cost of a larger unit.
Which one to buy if
- you want one machine that vacuums and mops
The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock has mop pads that lift on carpet and clean themselves at the dock.
- you only want a vacuum with the widest smart home support
The iRobot Roomba Max 705 supports Matter and reaches Apple Home, SmartThings and Home Assistant, which the combo does not.
- price is the deciding factor
The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock is the cheaper of the two and adds mopping for less.
- you want the longest runtime on a charge
The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock is rated at up to 200 minutes against about 120 for the iRobot Roomba Max 705.
- your furniture sits low to the floor
At 84 mm the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock is the lower body of the pair, against 104 mm for the iRobot Roomba Max 705.
$899.99
- + Connectivity: 2.4 GHz WiFi, 5 GHz WiFi, Bluetooth
- + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- - Price: $899.99 vs $599.00
- - Rating: 3.8 vs 4.2
Winner
14% OFF
$599.00
$699.99
- + Price: $599.00
- + Rating: 4.2
- + 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
iRobot Roomba Max 705 owners and iRobot Roomba Plus 515 Combo Robot + AutoWash Dock owners both describe a robot that takes the emptying off their hands, and both groups praise the map and the dock when the unit behaves. iRobot Roomba Max 705 owners single out strong carpet and pet-hair pickup and quieter runs than older Roombas, with Wi-Fi setup around special characters in the password their most common complaint. iRobot Roomba Plus 515 Combo Robot + AutoWash Dock owners talk about the vacuuming on wood, tile and low rugs and the pads lifting on carpet, while they warn that mopping is only decent, cords snag the pads, the dirty-water tank needs prompt emptying and 2.4 GHz-only setup is fiddly.
Frequently Asked Questions
Which is better overall: iRobot Roomba Max 705 or iRobot Roomba Plus 515 Combo Robot + AutoWash Dock?
The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock for most homes, because it adds mopping, more suction, a longer battery and a self-washing dock at a lower price. The iRobot Roomba Max 705 wins only if you want a vacuum-only robot with the widest smart home support.
What is the biggest difference between the iRobot Roomba Max 705 and the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock?
Mopping. The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock mops with pads that lift on carpet and clean themselves at the dock, while the iRobot Roomba Max 705 has no mopping hardware at all.
Does the iRobot Roomba Max 705 mop floors?
No. The iRobot Roomba Max 705 has no water tank and no detergent compatibility. Its AutoEmpty dock only empties the dustbin, unlike the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock, which washes and dries its mop pads.
Which of the two works with Apple Home and Matter?
Only the iRobot Roomba Max 705. It supports Matter, which brings it into Apple Home, SmartThings and Home Assistant. The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock works with Alexa and Google Home and has no Matter support.
Who should buy the iRobot Roomba Max 705?
A buyer who wants a dedicated vacuum, not a combo, and who values the widest smart home and Wi-Fi support, accepting that it cannot mop and that its dock only empties the bin.
Who should buy the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock?
A pet home with mostly hard floors and a few rugs that wants a strong vacuum plus light mopping and a self-washing dock for the lower price.
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