iRobot Roomba Plus 515 Combo
For large, low-furniture homes that want a hot-wash mopping dock and long runtime without paying for camera obstacle avoidance.
Amazon $599.99$599.99
The iRobot Roomba Plus 515 Combo is the better robot vacuum overall, rated 3.9 to 3.5. The iRobot Roomba Plus 515 Combo leads on value. The Roborock Saros Z70 wins on navigation and mopping. The iRobot Roomba Plus 515 Combo costs $399.99 less ($599.99 vs $999.98).
Roborock Saros Z70
#101 in Self-cleaning dockFull review
For early adopters who want a robot that tidies small clutter; buyers who just want clean floors get more for less elsewhere.
Amazon $999.98$999.98
Prices were last checked October 26, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the iRobot Roomba Plus 515 Combo for value ($600 vs $1,000).
- Choose the Roborock Saros Z70 for navigation (LiDAR + camera vs LiDAR) and mopping (Dual spinning pads, leaves its mop at the dock for carpet, extends to edges vs Dual spinning pads, lifts 10 mm, extends to edges).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every self-cleaning dock robot vacuum; a clear win is highlighted. How we rank explains each one.
| Factor weight | iRobot Roomba Plus 515 Combo | Roborock Saros Z70 |
|---|---|---|
| Overall rating | 3.9/5 | 3.5/5 |
| Cleaning 30% | 48 not yet tested; estimated from 3 tested iRobot robots and the median of the 70 tested robots | 20 measured 67% of sand from carpet, 83% of pet hair, some hair tangled (0.5) |
| Value 25% | 67 $600 | 36 $1,000 |
| Dock 20% | 100 Self-empties the bin, washes the mop, hot-water mop wash, hot-air mop drying | 100 Self-empties the bin, washes the mop, hot-water mop wash, hot-air mop drying, doses detergent, optional water hookup |
| Navigation 15% | 65 LiDAR | 100 LiDAR + camera |
| Mopping 10% | 76 Dual spinning pads, lifts 10 mm, extends to edges | 86 Dual spinning pads, leaves its mop at the dock for carpet, extends to edges |
Independent tests
iRobot Roomba Plus 515 Combo
No independent test published yet.
Roborock Saros Z70
| Tested by | Carpet deep clean | Pet hair | Hair tangle (0 = none) | Area per charge | Conditions |
|---|---|---|---|---|---|
| Vacuum Wars | 67% | 83% | 0.5 | 1,204 sq ft | Embedded sand in medium-pile carpet; flattened 2.5 in pet hair on carpet, two runs; 7 in hair tangle on hard floor (0 = none wrapped). |
Specifications
| iRobot Roomba Plus 515 Combo | Roborock Saros Z70 | |
|---|---|---|
| Vacuum | ||
| Claimed suction | 22,000 Pa | 22,000 Pa |
| Main brush | multi-surface rubber and bristle brush | FreeFlow brush |
| Dustbin | - | 180 mL |
| Extending side brush | - | Yes |
| Mopping | ||
| Mop | Dual spinning pads, lifts 10 mm, extends to edges | Dual spinning pads, leaves its mop at the dock for carpet, extends to edges |
| Mop lift | 10 mm | 15 mm |
| Leaves mop at dock | No | Yes |
| Extending mop | Yes | Yes |
| Water tank | - | 69 mL |
| Dock | ||
| Dock | Washes mop + empties | Washes mop + empties |
| Self-empties | Yes | Yes |
| Washes mop | Yes | Yes |
| Hot-water wash | Yes | Yes |
| Hot-air drying | Yes | Yes |
| Detergent dosing | - | Yes |
| Water hookup option | - | Yes |
| Navigation & app | ||
| Navigation | LiDAR | LiDAR + camera |
| Obstacle avoidance | Object sensing (sensor type not given) | 3D sensing, VertiBeam and dual cameras; the OmniGrip arm can move light items such as socks out of the way |
| Climbs thresholds | - | 40 mm |
| Matter | - | Yes |
| Voice assistants | - | Alexa, Google Assistant |
| Build | ||
| Height | 3.3 in (84 mm) | 3.1 in (79.8 mm) |
| Retracting LiDAR | - | No |
| Battery | 5,200 mAh | 6,400 mAh |
| Run time | Up to 4 h 55 min | Up to 3 h |
| Weight | 6.4 lb (2.9 kg) | - |
| Warranty | - | 1 year |
| Released | 2026-07 | 2025-05 |