Research says Amazon could eventually dominate the worldwide tablet market.
Analytics firm, Localytics, says half of all Android tablets in the US are Kindle Fires or Kindle Fire HDs.
However, the firm points out that 89% of all Amazon tablets are in United States. Besides the United States and Great Britain, all other countries have less than 1% of Kindle Fires.
The research suggests that Amazon could quickly take the dominant share of the Android tablet market worldwide.
"While Amazon's issues achieving international distribution of their hardware have been widely reported, it is interesting to note that should they get the distribution part right, their US success suggests they could quickly dominate the Android tablet market worldwide," the report said. "Even in Canada, which is often the first non-US country to receive an American company's products, the Kindle Fire is currently unavailable."
Localytics advises Android developers who focus on tablets to start distributing their apps in the Amazon app store.
"The degree to which Amazon has dominated their most serious geographical market should speak to the future potential, and since Google Play is unavailable on the Kindle Fire family, adding Amazon's App store as a distribution channel is important."
Amazon's VP recently said at a Kindle Paperwhite event in Canada that the company is working to launch the Kindle Fire line-up worldwide.