Snapchat? Does all of my SC history get deleted if done by one?

If I delete all the history on my iphone snapchat feed, will it delete the feed from other device?

No, it will not.

The thing with history is it simply deletes the history of the device you're on. Where that particular IP address has gone. So you can't delete someone else's history without their IP/computer/device access.

The thing with SnapChat, is if you're sending photos you don't want shared. Then there really is no safe alternative. SnapChat works by sending the photo, but after 10 seconds, it rescrambles the web address to access said photo. So while the person you've sent it to can no longer see it, not having the right web address anymore, anyone with any internet skill can find their way through SnapChats servers and pull these photos. It's unlikely, but entirely possible.

My suggestion? Sending photos you don't want others to see? Don't send them at all. In this digital age, there's no true privacy.