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Material change log

What changed—and why.

This log tracks meaningful changes to evidence, conclusions, model scope and safety boundaries. Cosmetic edits do not reset a review date.

Coverage expansion

Four brands with English and Chinese guidance

Added ECOVACS and Narwal alongside Roborock and Dreame, with model, comparison, accessory, maintenance, troubleshooting and app-region guides in both languages.

  • Product imagesLinked from official manufacturer sites with attribution.
  • Editorial graphicsOriginal diagrams based on the sources cited on each page.
  • Language consistencyEnglish and Chinese pages use the same verified models, numbers and scope.