Dreame X40 Ultra

The spec-sheet champion

Best for: Feature-maximalists

Key facts

Figures are from public sources and classified for confidence in our evidence ledger. Prices change often — confirm on the official site. Data checked 2026-07-10.

Strengths

• Extendable mop and arm reach corners rivals miss
• Excellent suction and dock automation
• Aggressive feature velocity

Limitations

• Support network thinner than iRobot/Roborock
• Parts availability varies by region
• App data practices deserve a read

Scores by category

Editorial 0–100 scores, weighted per the v1.0 methodology. The ⓘ links go to each score's source.

Longevity & independence

Longevity grade B (80%). Server dependency is partial (Degrades without cloud); company-stability risk is low. The grade combines server dependence, subscription dependence, company stability and repairability — formula on the methodology page.

Alternatives

Source ledger

Every category score links to the public source it was reasoned from. Factual figures (price, status, subscription) are classified in the evidence ledger.

No mandatory subscription in the current data. True 3-year cost = purchase price + required subscription × 36 months (optional accessories excluded).