Estimation of user-specific length of time required to download application program over-the-air onto a remote module, such as a wireless device, is calculated based on data transfer rates for data files sent over network to wireless device preceding a requested download of application program. Data transfer rates are calculated while user of wireless device browses application programs for download and/or purchase. Wireless device utilizes data transfer rates and information representing size of selected application program to estimate length of time required to download application program onto the wireless device and displays estimate to user.