Remember the Seattle app developer whose iPad app was, at first, rejected by Apple, resulting in a phone call from Steve Jobs?

He's now created a Windows PC version of that app called Economy, which tracks U.S. economic statistics. (Economy app screen capture courtesy of Cascade Software.)

Ram Arumugam, CEO of Cascade Software, had created the iPad version of the Economy app last year. But because he had used a non-public code, also known as a private application programming interface (API), to work around an issue, Apple rejected the app. (Apple sends software developers a list of APIs that it supports. If an API is not on the list, Apple cannot guarantee support, meaning that in future versions of the iPad, the app may not work.)

Arumugam appealed and sent an email to Jobs. Jobs called back.

Arumugam figures he might have merited a call because his company's Economy app for iPhone was the top paid app in the finance category for a time, and its Election app was the top paid app in the news category for a while in 2008.

After Arumugam removed the private API, Apple accepted the app.

Since then, Arumugam has created Economy app for Windows PC, which became available last month on the Intel AppUp store.

It was Intel that first contacted Arumugam about creating a version of his app for its store. "I didn't even know they had an app store," he said. "Very few people know about the app store."

He was wary of committing time and resources to a store so few people knew about but Intel guaranteed him a certain sum, he said. Besides, he says, with hundreds of millions of people running PCs with Windows XP or Windows 7 on them, "there's a big market."