Apple's blockbuster revenue growth is slowing drastically, as iPhone sales plateau and the company finds itself lacking revolutionary new products. [File Photo]

Apple's blockbuster revenue growth is slowing drastically, as iPhone sales plateau and the company finds itself lacking revolutionary new products.

Analysts said the warning suggested Apple can no longer sustain its growth without some completely new products. Its last revolutionary creation, the iPad, was launched in 2010. Co-founder Steve Jobs, who was the engine behind the creation of the iPod, iPhone and iPad, died in 2011.

"It has been an overriding concern with Apple that they would not be able to generate revenue growth just rolling out new versions of old products," said Jeff Sica, president and chief investment officer of SICA Wealth Management. "Now they've proven it in their numbers."

On a conference call with analysts on Wednesday, Apple CEO Tim Cook rebutted that idea, but as usual, gave no details.

"We're working on some incredible stuff. The pipeline is chock full," he said.

Apple said it expects sales of between US$41 billion and US$43 billion in the current quarter, which ends in March. That would usually be little cause for concern, even though analysts were expecting US$45.6 billion, because Apple usually lowballs its forecasts. But Chief Financial Officer Peter Oppenheimer said the company is changing its practices and providing a reasonable range rather than a single, easily achievable number.

That means Apple is looking at sales growth of about 7 percent from last year's January-March quarter, a striking number for a company that's posted double-digit increases in every quarter except one since 2008.

Apple's enviable profit growth also hit a wall in the October-December period. It said net income in the quarter was US$13.1 billion, or US$13.81 per share, flat with a year ago. That still beat expectations, as analysts polled by FactSet had forecast earnings of US$13.48 per share.

Revenue was US$54.5 billion, an increase of 18 percent from a year ago. Analysts were expecting US$55 billion. Sales were held back by the fact that the latest quarter had 13 weeks, one less than the corresponding 2011 quarter.

Apple shipped 47.8 million iPhones in the quarter, about 1 million less than analysts were expecting, and 22.9 million iPads, also about 1 million short.