No, Cefipx is 100% legal app.

Yes, Cefipx supports wide range of iPod and iOS devices, including iPod(iPod Nano, iPod Classic,iPod Shuffle), iPhone (iPhone, iPhone 3G, iPhone 3GS, iPhone 4, iPhone 4S), iPad (iPad 1, iPad 2, New iPad). And works with up to iOS 5.1.

Try to remove your iPod from computer, and connect it again. This always solves the problem.

There're many reasons can cause the crash.
First, please check that iTunes can recognize your iPhone/iPad, if yes, contact us with details about version of iOS and iTunes.

Otherwise, if Cefipx crashes, and there is something like "Reason: *** -[__NSPlaceholderDictionary initWithObjects:forKeys:count:]: attempt to insert nil object from objects[0]" contained in the crash report.
This is always because that your system or hard disk get errors. Please try to fix the disk errors with "Disk Utility", or reinstall your Mac system.