마스킥 is a free Android application designed to help users identify and report scammers in online marketplaces, particularly in second-hand trading platforms like 중고나라. This lifestyle app provides a dedicated service for users to check the credibility of sellers and buyers, ensuring safer transactions. The app has extended its compatibility to older Android versions, including Jelly Bean, making it accessible to a wider audience.

With 마스킥, users can actively participate in creating a safer trading environment by registering scammer information. The app emphasizes community involvement, encouraging users to report fraudulent activities they encounter. By utilizing this service, users can better protect themselves from potential scams, making their online shopping experience more secure and reliable.