Can a cracked iPhone 6 screen just damage the whole phone?

I just cracked my screen yesterday and my phone was working fine until it started freezing then died and now all it does is stay on the apple logo /

Might be a System error. You should take it to a nearby Apple center for diagnosis

Carry it to an Apple Store.

Yes it can, better get it replaced and in case you need some good security app, Leo Privacy Guard would be the best. Through it you can secure all your apps on your device.