April 25, Beijing time, foreign media reported that although Amazon has not disclosed the details of application sales related to its mobile client app store (Amazon Appstore), a report by App Annie, a mobile app analytics company, indicates that Amazon's Amazon Appstore is showing increasing momentum among developers. App Annie surveyed 1,500 developers and found that 22.5% of them had released apps on Amazon's Amazon Appstore, with half of these developers considering Amazon as their primary revenue engine.This survey also aligns well with previous related reports. It was previously reported that the revenue per user of Amazon's Amazon Appstore had surpassed Google Play and, in some ways, even iOS. For example, last summer, mobile game startup TinyCo said that its revenue per user in the Amazon store was higher than iTunes or Google Play. However, another report from Flurry indicated that the revenue per user on iTunes was at an industry-leading level, while the Amazon store still ranked second in terms of revenue generation. Flurry's findings showed that if users spent $1 in the iOS store, then the Amazon store would generate $0.89 in revenue, while Google Play would generate $0.23. However, Flurry's survey took place a year ago.App Annie's report today also found that the average price of top paid apps in the iOS and Google Play stores is higher than in the Amazon store. Compared to the average price of the top 400 paid apps in the iOS and Google Play stores, the average price of apps in the Amazon store is $1.73, while for iPhone apps it is $2.21, for iPad apps it is $3.39, and for Google Play apps it is $3.55.Related reports indicate that although Google Play's revenue remains high, the influence of the Amazon store continues to grow. Another analysis firm, Distimo, reported that while the download volume of paid apps in Google Play is twice that of the Amazon store, the revenue gap between the two is narrowing. According to Distimo's analysis, in March 2013, the revenue from the top 200 paid apps in the US market for Google Play was $5.2 million, approximately 1.7 times that of the Amazon store. However, Distimo's report also lists examples of successful apps in the Amazon store, which aligns closely with the relevant content in App Annie's report. In short, for some developers, the Amazon store seems more capable of bringing them success than Google Play, and as the scale of the Amazon store continues to expand, its potential to generate revenue for developers also grows.Recently, Amazon announced that it will expand the coverage of its app store to nearly 200 countries, including Australia, Brazil, Mexico, Canada, South Africa, and South Korea, among others. Previously, Amazon's store coverage already included the United States, the United Kingdom, Germany, France, Italy, Spain, and Japan. In fact, the growth potential of Amazon's app store is not only related to the continuous expansion of its geographical markets but also to its rich experience in e-commerce and related architectures. (Niu Niu)