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Comparing 2 robot vacuums

Your shortlist side by side: today’s price, our score and every fact the maker states.

Green is the best of these 2, also when they share the lead.

Narwal Freo S × Best on 2 facts Dreame D20 Air Plus × Best on 4 facts
Most important facts
Lowest price 237 €Saturn 199 €Amazon.de best
Score not in our ranking 5.5
Customer rating ★ 4.2 · 5 reviews ★ 5.0 · 1 review
Tests – Just A Dad Approved
Suction power higher is better 8,000 Pa 20,000 Pa best
Runtime per charge longer is better 210 min best 150 min
Climbs thresholds up to higher is better same on both 20 mm 20 mm
Robot height lower is better 10 cm 9.5 cm best
Dust bag lasts longer is better up to 180 days best up to 120 days
Navigation same on both LiDAR turret LiDAR turret
Rank
Rank – rank 3 of 13 with an auto-empty station
Mopping
Mop type same on both flat pad flat pad
Automatic mop detach same on both no (assumed) no (assumed)
Washes the mop – no
Hot-air drying – no
Station
Station same on both auto-empty station auto-empty station
Plumbing hookup – no (assumed)
Brush and obstacles
Anti-tangle brush no (assumed) yes (best)
Obstacle avoidance 3D sensor (structured light) none
Climbing system for high thresholds same on both no no (assumed)
Noise and age
Noise while cleaning not judged 62 dB 76 dB
On the market since June 2025 December 2025
Suction and brushes
Extending side brush same on both no (assumed) no (assumed)
Carpet detection – detects carpet
Suitable for pet hair – yes
Dirt detection – yes
Mopping
Mop extends to the edges same on both no (assumed) no (assumed)
Mop refreshed while mopping same on both no (assumed) no (assumed)
Water tank in the robot 300 ml 280 ml
Dock
Empties the dust bin same on both yes yes
Bagless same on both no no
Dust bag capacity 3.5 l 4 l
Free space beside the dock 50 cm –
Free space in front of the dock 150 cm –
Dries the mop – no
Dispenses detergent – no (assumed)
Clean water tank – 4 l
Navigation and obstacles
No-go zones – zones in the app
Stair-edge sensors – yes
Robot
Robot diameter 33 cm 32.5 cm
Robot weight 3.2 kg 2.59 kg
Dust bin in the robot 250 ml 220 ml
Battery
Battery capacity same on both 3,200 mAh 3,200 mAh
Charging time – 4.5 h
Smart features and warranty
Matter same on both no (assumed) no (assumed)
Voice assistants Alexa, Google Assistant Alexa, Google Assistant, Siri
Warranty same on both 2 years 2 years
Scheduled runs – yes

Facts as the maker states them. A dash means the maker does not name it. Each model’s page gives the source of every fact. Noise is the maker’s own figure, so we do not judge it, and a customer rating only counts from 20 reviews.

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