Based on the sales and ranks of our very own Weather HD, we estimate that the Top 1,000 iPad paid applications are making about $372,000 per day, which sums up to about $136 million per year. This figure is based on there being only 500,000 iPads in the market, and is accounting only for the application sales in the United States. If the iPad App Store were to be like the iPhone’s, then 40-60% of the sales would occur internationally, so on average that figure would rise to become $272 million per year.
We believe this to be a conservative estimate. If the iPad were to enjoy a lucrative growth as the iPhone’s, which rose from 100 million downloaded applications in the first 2 months to 4 billion 19 months after, we can easily see the iPad’s App Store becoming a $1 billion per year market in 2 years.