If you've already got duplicate files on your iDevice, you can easily display and remove them. Therefore just push the right mouse button in the main track-list and choose "Show duplicates". This way you can delete all duplicate files from your iPhone, iPod or iPad.
Here's how the program looks like
You can download this free iTunes Alternative from the following page:
Download the free iTunes Alternative for iPhone, iPad and iPod
You've got the choice between the Installer for the Control Center (containing all CopyTrans apps) and the standalone version, which doesn't require installation.
CopyTrans Manager supports the following devices:
- iPhone, 3G, 3GS and 4 up to iOS4
- iPod Touch, 2G, 3G and 4G up to iOS4
- iPad 1 up to iOS 4
- iPod Nano up to iPod Nano 5G
- iPod Classic, iPod Video and iPod Photo
- iPod Shuffle up to iPod Shuffle 2G
- iPod Mini
- Mac formatted iPods (HFS+)
- Palm Pre