Dreame X40 Ultra Robotic Vacuum

Pros

• Dirty water sensor ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 2 reviews 5.0
  A built-in sensor monitors the dirty-water line and can trigger extra mop-washing cycles when the water is still dirty, keeping the mop pads cleaner with little user effort.
• Carpet — Medium-Pile Pickup ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 1 review 5.0
  Carpet deep-clean tests indicate the X40 Ultra removes embedded debris from carpets better than the earlier X30 model and above the test average.
• Surface safety with attachments ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 1 review 5.0
  High-temperature self-cleaning at around 158°F washes the mop and washboard between runs, using a gear-driven squeegee system and a dirty-water sensor that can trigger extra cycles to reduce built-up stains and odors with minimal manual scrubbing.
• Mop lifting system ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 4 reviews 4.9
  A removable, liftable mop can raise the robot about 10.5mm to keep carpets dry and let it move between hard floors and rugs without manual intervention, and a magnetic pad mode can leave the pads at the base so it vacuums carpets first before returning to mop hard floors.
• Overall opinion ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 4 reviews 4.9
  Overall, the X40 Ultra is regarded as one of the very best robot vacuums tested, pairing excellent navigation, class-leading suction, and strong mopping into a flagship package that now tops the reviewer’s internal rankings and is especially easy to recommend for pet-heavy homes if you can justify the high price.
• Map & Path Efficiency (Robot Vacuums) ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 3 reviews 4.8
  3D structured-light mapping with an onboard camera and LED builds accurate room maps and helps the X40 Ultra clean efficiently, delivering near-perfect coverage of test floor plans without getting stuck and reaching under furniture where hair tends to accumulate.
• Self-cleaning cycle ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 3 reviews 4.8
  High-temperature self-cleaning at around 158°F washes the mop and washboard between runs, reducing built-up stains and odors with limited manual scrubbing.
• Hard Floor — Fine Dust Pickup ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 2 reviews 4.8
  Tests show the X40 Ultra nearly perfectly picks up fine debris from hard floors, leaving very little dust behind even in single-pass runs.
• Hard Floor — Large Debris Intake ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 2 reviews 4.8
  The X40 Ultra handles large and extra-large debris on hard floors extremely well, rarely pushing particles around or leaving visible trails.
• Suction & Airflow ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 7 reviews 4.7
  With roughly 12,000Pa of suction, the X40 Ultra sits at the top of its test group, testing significantly stronger than the previous X30 Ultra and well above average, easily pulling up embedded debris and pet hair even in multi-pet households.
• Obstacle Avoidance (Robot) ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 5 reviews 4.7
  The Dreame X40 Ultra uses lidar and onboard cameras plus 3D structured light to navigate and reliably avoid common floor hazards and clutter, earning a top-tier, near-perfect obstacle-avoidance score in testing even if tangled cords can still be a challenge.
• Mopping performance ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 8 reviews 4.7
  Dual rotating mop pads and smart controls deliver near best-in-class mopping, with Omni dirt detection that deep-scrubs stubborn messes and real-world tests showing it easily removes dried coffee and juice stains, even outperforming other flagship robots on tough spots.
• AI, Smart & App / Automation ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 6 reviews 4.7
  The Dreame app provides robust mapping, room-specific controls, virtual no-go boundaries, and custom modes and pet zones, plus 3D maps, advanced scheduling, and extras like two-way pet video calling to fine-tune how and where the X40 Ultra cleans.
• Pet-Ready Features ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 3 reviews 4.7
  Marketed as a top pick for pet owners, the X40 Ultra combines very strong suction, pet-zone controls, and a side-reach brush with reliable pet-hair pickup, two-way pet video calling, and smart options like boosting suction near litter boxes to suit multi-pet homes.
• Emptying & Mess Control ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 2 reviews 4.5
  The base station automatically empties the robot’s bin into a large disposable bag and contains dust well, greatly reducing messy manual emptying between runs.
• Hair‑Wrap / Tangle Resistance ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 2 reviews 4.5
• Under-Furniture Pickup ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 2 reviews 4.5
  The X40 Ultra is praised for how effectively it cleans under furniture, reaching low, hidden areas where hair tends to build up.
• Battery & Charging ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 1 review 4.5
  A 6,400mAh battery, efficient power use, and recharge-and-resume allow the X40 Ultra to cover very large floor plans on a single charge or with minimal pauses to top up.
• Controls & UI ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 1 review 4.5
  The Dreame app is described as fully loaded yet increasingly easy to use, with clearly organized controls for cleaning modes, mapping, and obstacle-avoidance behaviors.
• Corner Cleaning (Robot) ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 1 review 4.5
• Ease of use ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 1 review 4.5
• Maintenance requirements ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 1 review 4.5
• Edge & Baseboard Cleaning (Hard Floors) ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 3 reviews 4.3
  A swinging side brush and extending mop pad help the X40 Ultra clean along edges and in corners, delivering decent but not flawless edge and baseboard coverage.
• Hair Pickup — Carpets ★ ★ ★ ★ ★ ★ ★ ★ ★ 1 review 4.0
  In hair tests the X40 Ultra picked up pet and human hair effectively from carpeted areas, though very long strands can still contribute to some tangling.