Narwal Flow
The first Narwal track-mop robot, still a good hard-floor mopper. The Flow 2 does more for similar money.
Amazon $1,249.99$1,249.99
The Narwal Flow is the better robot vacuum overall, rated 3.9 to 3.5. The Narwal Flow leads on cleaning. The Roborock Saros Z70 wins on value. The Roborock Saros Z70 costs $250.01 less ($999.98 vs $1,249.99).
Roborock Saros Z70
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 Narwal Flow for cleaning (measured 83% of sand from carpet, 88.5% of pet hair, no hair tangled vs measured 67% of sand from carpet, 83% of pet hair, some hair tangled (0.5)).
- Choose the Roborock Saros Z70 for value ($1,000 vs $1,250).
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 | Narwal Flow | Roborock Saros Z70 |
|---|---|---|
| Overall rating | 3.9/5 | 3.5/5 |
| Cleaning 30% | 65 measured 83% of sand from carpet, 88.5% of pet hair, no hair tangled | 20 measured 67% of sand from carpet, 83% of pet hair, some hair tangled (0.5) |
| Value 25% | 22 $1,250 | 36 $1,000 |
| Dock 20% | 95 Self-empties the bin, washes the mop, hot-water mop wash, hot-air mop drying, optional water hookup | 100 Self-empties the bin, washes the mop, hot-water mop wash, hot-air mop drying, doses detergent, optional water hookup |
| Navigation 15% | 100 LiDAR + camera | 100 LiDAR + camera |
| Mopping 10% | 92 Roller, lifts 12 mm, extends to edges | 86 Dual spinning pads, leaves its mop at the dock for carpet, extends to edges |
Independent tests
Narwal Flow
| Tested by | Carpet deep clean | Pet hair | Hair tangle (0 = none) | Area per charge | Conditions |
|---|---|---|---|---|---|
| Vacuum Wars | 83% | 88.5% | 0 | 1,399 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). |
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
| Narwal Flow | Roborock Saros Z70 | |
|---|---|---|
| Vacuum | ||
| Claimed suction | 22,000 Pa | 22,000 Pa |
| Main brush | Single-side roller brush (DualFlow tangle-free system) | FreeFlow brush |
| Dustbin | - | 180 mL |
| Extending side brush | No | Yes |
| Mopping | ||
| Mop | Roller, lifts 12 mm, extends to edges | Dual spinning pads, leaves its mop at the dock for carpet, extends to edges |
| Mop lift | 12 mm | 15 mm |
| Leaves mop at dock | No | Yes |
| Extending mop | Yes | Yes |
| Water tank | 130 mL | 69 mL |
| Dock | ||
| Dock | Washes mop + empties | Washes mop + empties |
| Self-empties | Yes | Yes |
| Dust bag | 2.5 L | - |
| Washes mop | Yes | Yes |
| Hot-water wash | Yes | Yes |
| Hot-air drying | Yes | Yes |
| Detergent dosing | No | Yes |
| Water hookup option | Yes | Yes |
| Navigation & app | ||
| Navigation | LiDAR + camera | LiDAR + camera |
| Obstacle avoidance | Dual RGB cameras with AI, recognises 200+ object types; laser edge sensors | 3D sensing, VertiBeam and dual cameras; the OmniGrip arm can move light items such as socks out of the way |
| Climbs thresholds | 30 mm | 40 mm |
| Matter | Yes | Yes |
| Voice assistants | Alexa, Google Assistant, Siri, Hey Nawa (built in) | Alexa, Google Assistant |
| Build | ||
| Height | 3.7 in (95 mm) | 3.1 in (79.8 mm) |
| Retracting LiDAR | No | No |
| Battery | 5,900 mAh | 6,400 mAh |
| Run time | - | Up to 3 h |
| Weight | 11 lb (5 kg) | - |
| Warranty | 1 year | 1 year |
| Released | 2025-08 | 2025-05 |