A software product server, such as an application server or application store, can receive a purchase request for an application from a remote device. In response to a received request, the software product server is configured to provide an application to a remote device. The remote device receives the application and determines whether the received application is compatible with the remote device. The remote device is configured to generate a verification signal about the compatibility and provide the verification signal to a verification module coupled to the software product server. The verification signal is used to update a user account debit status. For example, a user account is debited when the verification signal indicates the received application is compatible with the remote device.