A primary APP unlocked after completing a side quest. Functions include: Contamination Cleanup (sweeps away contamination within a 200-meter radius, requires binding an item as carrier), Sterilization Guard (exterminates contaminated species below B-rank with a light tap, turning them to dust, no usage limit), General Cleaning (cleans physical hygiene in a specified area once every hour), and Intrusion (can turn into a virus to invade others' ability items and cause temporary bugs). Wen Xi bound it to her Portable Cottage.
