A couple weeks ago, eBay unveiled a new classifieds site, called eBayClassifieds, to replace its old site, Kijiji, in the United States. It will also introduce two new mobile apps, one for listing and selling items for sale and another for posting or searching classifieds. A third app, for the iPad, is to be released April 3.

The new classifieds site is eBay’s attempt to re-energize its classifieds business during a time when it is under attack. Kijiji is successful in other countries, like Canada and Australia, and it will keep the Kijiji name abroad. In the United States, though, where Craigslist rules the classifieds business, it has never been able to dominate. In February, Kijiji had two million visitors, while Craigslist had 4.5 million, according to Compete.

In addition to the new name, the site has a new look that will make it easier to search for items, said Lorrie Norrington, president of eBay Marketplaces. It does not accept personal ads or adult-related content and will have improved filtering of ads and profiles of sellers to make people more comfortable shopping on the site, she said.

Craigslist and eBay are awaiting a ruling after a contentious trial last winter. EBay owns a minority stake in Craigslist, and the two companies have been battling over a board seat and the competitive threat from Kijiji.

Asked about Craigslist, Ms. Norrington said: “It’s pretty clear the U.S. market is huge. There is plenty of room for multiple players.”

The mobile apps will be eBay’s third and fourth. Its main app, for searching, buying and paying for items on eBay, has surprised executives with its success, Ms. Norrington said. Another app, called Deals, sends daily deals to the shopper’s iPhone. Eight million people shop eBay on their iPhones. Mobile commerce generated $600 million in merchandise volume last year, and eBay expects that to increase to $1.5 billion this year.

With the new selling app, eBay sellers can take a picture of the table collecting dust in the attic and list it on eBay in less than a minute, the company said. On the new classifieds app, shoppers can post, search and reply to ads.

Will especially active eBay users — who buy, sell, monitor deals and use the classifieds site — want to download four separate apps and switch among them?

Yes, because they want simple, easy-to-use apps, Ms. Norrington said. “Customers are telling us they want to be able to do things at the touch of a button in their hand, easy and convenient, instead of cluttering it up with all kinds of functionality.”