In-app purchases account for 76 percent of all U.S. iPhone App Store revenue, Distimo revealed today in a new report. According to the report, in-app purchases accounted for at least 90 percent of all revenue in the Asian markets, which include Hong Kong, Japan, China and South Korea.

The report also revealed that the average revenue per download of the top 250 apps released since January 2012 is $0.99 in the U.S, and $3.12 in Japan. Another interesting metric is that freemium apps generate the least amount of revenue per download, averaging $.93 in returns among the top 250 apps in the Apple Apple Store.

Here is more from the report: “Paid apps without in-app purchases generate $2.25 in the Apple App Store for iPhone in the U.S. Paid apps with in-app purchases generate even more per download, indicating that users are not put off by the fact that they also have to pay for additional features within the app, in addition to the one-off fee they initially paid for their app.”