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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.

AIRROBO L50+ × Best on 1 fact Dreame D20 Air Plus × Best on 4 facts
Most important facts
Lowest price 205 €OTTO 199 €Amazon.de best
Score not in our ranking 5.8
Customer rating – –
Tests – Just A Dad Approved
Suction power higher is better 5,500 Pa 20,000 Pa best
Runtime per charge longer is better 240 min best 150 min
Climbs thresholds up to higher is better – 20 mm
Robot height lower is better 9.5 cm 9.5 cm best
Dust bag lasts longer is better up to 75 days up to 120 days best
Navigation same on both LiDAR turret LiDAR turret
Rank
Rank – rank 3 of 10 with an auto-empty station
Mopping
Mop type same on both flat or vibrating pad flat or vibrating 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 same on both yes yes
Obstacle avoidance – none
Climbing system for high thresholds same on both no (assumed) no (assumed)
Noise and age
Noise while cleaning not judged 67 dB 76 dB
On the market since – December 2025
Suction and brushes
Extending side brush same on both no (assumed) no (assumed)
Carpet detection detects carpet and boosts suction 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 350 ml 280 ml
Steam no (assumed) –
Dock
Empties the dust bin same on both yes yes
Bagless same on both no no
Dust bag capacity 3.5 l 4 l
Dries the mop – no
Dispenses detergent – no (assumed)
Clean water tank – 4 l
Navigation and obstacles
Robotic arm no (assumed) –
No-go zones – zones in the app
Stair-edge sensors – yes
Robot
Robot diameter 35 cm 32.5 cm
Dust bin in the robot 340 ml 220 ml
Robot weight – 2.59 kg
Battery
Battery capacity 5,200 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
Wi-Fi band 2.4 GHz –
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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