Apple has released a fourth beta build of iWork for iOS to developers. This comes a little more than a day after iTunes 10.5 beta 9 was issued. The beta is available now through the Apple Developer Center.iWork for iOS beta 4 released to developers originally appeared on TUAW - The Unofficial Apple Weblog on Sat, 01 Oct 2011 11:45:00 EST. Please see our terms for use of feeds.