Do we need a mac book to build an iphone/ipad app and release in market?

If we don't need how else we can do this?

You can make your computer into a hackintosh, which means you can turn your desktop into a mac.

This video makes it really easy.

Depending on the language being used you can make the app on another system - but you would not have access to the extensive frameworks available when using a Mac. You do need a Mac (not a 'hackintosh') to submit the app.

You can rent the use of a Mac for a short period…

http://www.macincloud.com