Updated August 2026
Data from Amazon and official iRobot site.
2026 verdict
iRobot Roomba Plus 515 Combo Robot + AutoWash Dock wins the 2026 matchup against iRobot Roomba Plus 504, mainly on rating, battery life, and mopping functionality. It builds its lead on rating, battery life, and mopping functionality, then backs it up with a stronger showing on auto mop washing and auto mop drying. iRobot Roomba Plus 504 is the better fit only for buyers who prioritize price and integrations above everything else here. That is enough to make iRobot Roomba Plus 515 Combo Robot + AutoWash Dock the better pick for most buyers.
vs
Winner
| Feature | iRobot Roomba Plus 504 | iRobot Roomba Plus 515 Combo Robot + AutoWash Dock | Winner |
|---|---|---|---|
| Price | $694.99 | $699.99 | iRobot Roomba Plus 504 |
| Rating | 3.8 | 4.5 | iRobot Roomba Plus 515 Combo Robot + AutoWash Dock |
| Battery Life | 210 minutes | 295 minutes | iRobot Roomba Plus 515 Combo Robot + AutoWash Dock |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, IFTTT, Matter | Google Home, Alexa, IFTTT | iRobot Roomba Plus 504 |
| 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 |
| Connectivity | 2.4 GHz WiFi | 2.4 GHz WiFi | Tie |
| Navigation Type | Laser (LiDAR) | Laser (LiDAR) | Tie |
| Obstacle Detection | YES | YES | Tie |
$694.99
- + Price: $694.99
- + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, IFTTT, Matter
- - Rating: 3.8 vs 4.5
- - Battery Life: 210 minutes vs 295 minutes
Winner
- + Rating: 4.5
- + Battery Life: 295 minutes
- + Mopping Functionality: YES
- - Price: $699.99 vs $694.99
- - Integrations: Google Home, Alexa, IFTTT vs Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, IFTTT, Matter
Frequently Asked Questions
Which is better overall: iRobot Roomba Plus 504 or iRobot Roomba Plus 515 Combo Robot + AutoWash Dock?
iRobot Roomba Plus 515 Combo Robot + AutoWash Dock has the stronger overall profile in this comparison, especially for rating, battery life, and mopping functionality.
What is the biggest difference between iRobot Roomba Plus 504 and iRobot Roomba Plus 515 Combo Robot + AutoWash Dock?
Price is one of the clearest differences: iRobot Roomba Plus 504 lists $694.99, while iRobot Roomba Plus 515 Combo Robot + AutoWash Dock lists $699.99.
Which one looks better on price?
iRobot Roomba Plus 504 is listed at $694.99, while iRobot Roomba Plus 515 Combo Robot + AutoWash Dock is listed at $699.99. iRobot Roomba Plus 504 (better spec).
Who should buy iRobot Roomba Plus 504?
Choose iRobot Roomba Plus 504 if your priority is price and integrations and that matters more than rating.
Who should buy iRobot Roomba Plus 515 Combo Robot + AutoWash Dock?
Choose iRobot Roomba Plus 515 Combo Robot + AutoWash Dock if your priority is rating and battery life and that matters more than price.
iRobotRoomba Plus 415 Combo Robot + AutoWash Dock
$599.99- iRobot
Roomba Plus 515 Combo Robot + AutoWash Dock
$699.99 
EufyE25
37% OFF$999.99$629.99
EufyOmni S2
$1599.99
RoborockQrevo Curv 2 Pro
38% OFF£1199.99£749.99
DreameL60 Ultra FE
28% OFF$999.99$719.99
DreameL60 Ultra
10% OFF$1299.99$1169.98
Eufy11S MAX
39% OFF$279.99$169.99
EufyOmni C28
38% OFF$799.99$499.99
iRobotRoomba 705X
$1399.99
iRobotRoomba 415X
$789.98
RoborockSaros 10
19% OFF$1599.99$1299.99
RoborockSaros 20
$1599.99
EcovacsDEEBOT T80S Omni
26% OFF$649.99$479.00
EcovacsDEEBOT T90 Omni
14% OFF$699.99$599.99
EcovacsDEEBOT T90 Pro Omni
25% OFF$799.99$599.00
DreameL60 Pro Ultra
15% OFF$1399.99$1189.99
iRobotRoomba 105
$159.00
iRobotRoomba 105 Combo
38% OFF$319.99$199.99
iRobotRoomba 105X
$239.99
Robot VacuumsiRobotRoomba 104
$249.99- Robot VacuumsiRobot
Roomba 105 Combo
38% OFF$319.99$199.99 - Robot VacuumsiRobot
Roomba 105
$159.00 
Robot VacuumsiRobotRoomba 105X Combo
19% OFF$419.99$339.39- Robot VacuumsiRobot
Roomba 105X
$239.99 
Robot VacuumsiRobotRoomba 205
$149.00- Robot VacuumsiRobot
Roomba 415X
$789.98 
Robot VacuumsiRobotRoomba 505X
50% OFF$999.99$499.99- Robot VacuumsiRobot
Roomba 705X
$1399.99 
Robot VacuumsiRobotRoomba Combo 10 Max robot + AutoWash dock
45% OFF$1399.00$769.99
Robot VacuumsiRobotRoomba Max 705 Combo
39% OFF$1299.99$799.00
Robot VacuumsiRobotRoomba Max 705 with AutoEmpty Dock
45% OFF$899.99$499.00
Robot VacuumsiRobotRoomba Max 705
$899.99
Robot VacuumsiRobotRoomba Max 715 Vac Robot + AutoEmpty Dock
$699.99
Robot VacuumsiRobotRoomba Max 775 Combo Robot + AutoWash Dock
$999.99
Robot VacuumsiRobotRoomba Plus 405
50% OFF$799.99$399.00- Robot VacuumsiRobot
Roomba Plus 415 Combo Robot + AutoWash Dock
$599.99 - Robot VacuumsiRobot
Roomba Plus 504
$694.99 
Robot VacuumsiRobotRoomba Plus 505
50% OFF$999.99$499.00
Robot VacuumsiRobotRoomba Plus 507 Combo Robot + AutoWash Dock