DiDiDi is a Customer Relationship Management (CRM) application designed by NIPPON PAINT VIETNAM CO.LTD for iPhone users. The main functionality of this app revolves around providing Nippon Customer with a membership card containing a barcode for authentication purposes. Users can scan this barcode to log in as authorized members.

Once logged in, users can scan or manually input barcodes from Nippon Paint Products. These codes are then converted into loyalty points that can be accumulated and exchanged for rewards or promotions offered by Nippon Paint. The app also allows users to track their points over time, encouraging them to scan more products for increased benefits.