The huge popularity of iPhone devices means that more and more people are buying them every day. If this is your case then the next step is to transfer to your iPhone all your DVDs. For this you only need a tool like Apollo DVD to iPhone.
From the Apollo DVD to iPhone interface you can rip and transfer the content of your DVDs (in both PAL and NTSC formats) to a format compatible to your iPhone. The most interesting thing is that you don`t need to transfer everything, but the user can decide which tracks or chapters you want.
Apollo DVD to iPhone lets you preview how the conversion will turn out, so you can make sure it`s the quality you want.