Mobile Quality Control (QC) Apps in a factory's QC department are digital tools used on smartphones or tablets to inspect, record, and report product quality in real time. These apps streamline QC processes by allowing inspectors to capture data, photos, and defects directly on the shop floor, reducing paperwork and errors. Features often include checklists, barcode scanning, and instant reporting to ensure compliance with quality standards. They improve efficiency, traceability, and communication between teams, helping factories quickly identify and address quality issues.