If you want a utility to help you transfer data from your old iPhone to your new one, iMobie has a full-featured tool called AnyTrans. It lets you manage your iPhone, iPad and iPod content, transferring data, recovering it and performing other tasks, and it's good for people with some or no tech expertise.
Another good option is iMyFone, which offers a collection of utilities including iMyTrans and iTransor for LINE. Those tools let you transfer, export, back up and restore WhatsApp and LINE data, so you can carry your most important messages and contacts to your new phone. iMyFone's tools have a clean interface and are good at data import and export and recovery.
If you want to handle multimedia, WinXDVD has video conversion abilities, but also lets you handle iPhone data, too, so it's a good option if you want to transfer and organize your phone's contents. Its interface is easy to use, and it can handle a lot of formats, so it's good for people with some or no tech experience.