The war between Adobe and Apple just got hotter. With the announcement of iPhone OS 4.0 Apple has revised the Developer Program License Agreement to ban the use of cross compiler tools like Unity3d, Appcelerator’s Titanium, Adobe’s Flash CS5 etc. for developing iPhone and iPad applications. As per the new agreement developers can use only C, C++, Objective-C, and JavaScript to develop iPad/iPhone apps. Some companies like PhoneGap, Appcelerator and Unity3d having cross compiler products [that can publish the same code for iPhone/iPad or other mobile devices] have clarified or assured that the apps developed using their tools would still be accepted by Apple but there is no official response from Adobe on this.