PayPal Inc. has updated its mobile payment application for Android phones.

Users with phones running Google Inc.'s Android platform can now use the advanced features PayPal introduced for users of Apple Inc.'s iPhone in March.

These additions include a special calculator to facilitate splitting checks, and a "bump" feature that allows money movement by tapping two phones together.

The updated app was announced Thursday.

By the end of next year, "more people will own smartphones than any other phone in the U.S.," Laura Chambers, the senior director of PayPal Mobile, said on her company's blog, citing research from Nielsen Co.

"That's sure to drive people to use their phones to pay," she said.

PayPal, a unit of eBay Inc., said its mobile payment volume in the past six months is double what it was for all of 2009.

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