A method includes, after an application is purchased on a first application platform by using a first terminal, receiving, by the first terminal, a proof of purchase returned by the first application platform; transmitting, to a developer server of the application by using the first terminal, related information of a terminal that needs to be registered, such that the developer server records the related information of the terminal that needs to be registered, and applying, using the first terminal and using the proof of purchase, to the developer server for a discount voucher corresponding to a registered terminal, such that one of the developer server, the first application platform, and a second application platform saves the discount voucher or returns the discount voucher to the registered terminal corresponding to the discount voucher.