Easy video editors that are free?

I'm having trouble finding some video editors that are free and quick to get used to. I downloaded one on my Iphone and It's really hard to use to take videos with and stuff. I need a good one that's compatible with any computer.
Do you guys know any good video editors? Some with the basics of adding other videos, text, music and transitions.

What is the full name of the iPhone Video-editing APP you tried? And, what Make and Model of computer, and Operating System, do you use at home?

Very few, if any, Video-Editing Apps even work on an iPhone, including the "dumbed-down for Mobile" iMovie, because Mobile Devices in general do not have enough Processing Power to do video-editing.

You should really be looking for good video-editing Apps for your computer, that can import and export video clips from your iPhone, as well.

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