Nielsen: iPhone & Android own 71% of U.S. smartphone market

83% of the apps downloaded in the past month were for a Google or Apple phone

The U.S. smartphone market is starting to look like a two-horse race, judging from data scheduled to be released Wednesday by a Nielsen general manager at AppNation III in San Francisco. Among the new findings:

  • 44% of all U.S. mobile subscribers now own a smartphone
  • 56% of the mobile phones purchased in the past three months were smartphones
  • 71% or buyers purchased an "app friendly" -- Nielsen's phrase -- Apple (aapl) iPhone or Google (goog) Android phone
  • 83% of the app downloaders in the past 30 days use either iPhones or Android phones

As Nielsen's charts over the past nine months show, Android has grown to be the leading smartphone operating system (now with a 42.8% share), while Apple is still holding on as the leading smartphone manufacturer (with a 28.3% share).

The market shares of the alsorans -- Research in Motion (rimm), Microsoft (msft), Nokia (nok) and Palm (hpq) -- continue to shrink.

All products and services featured are based solely on editorial selection. FORTUNE may receive compensation for some links to products and services on this website.

Quotes delayed at least 15 minutes. Market data provided by Interactive Data. ETF and Mutual Fund data provided by Morningstar, Inc. Dow Jones Terms & Conditions: S&P Index data is the property of Chicago Mercantile Exchange Inc. and its licensors. All rights reserved. Terms & Conditions. Powered and implemented by Interactive Data Managed Solutions