Android Application

Google has a website with a login interface. It takes you to a web page that shows the stats for my Android apps: the total number of downloads and active users. I think it is loaded with an Ajax (JavaScript) call. I need a script that will automatically login on a regular basis (perhaps using a cron job) every 6, 12, or 24 hours, and record historical stats over time in a database. It is important that the script records and provides historical stats. I want to see how many downloads my apps get each day, even though Google does not provide this information (it only provides total download counts, up to the current moment). Thus, the script should login to Google's Android Market site and record my apps' download and active stats.