Project sharing

I sent myself an email to see how it would work. I opened it on my computer and, since I was already signed in it allowed me to see everything, but when I sent it to my phone, where I was not signed in it did not show the chart. It showed an option to log in or register. I figured it should have just shown the chart. Also if I send this to someone who is signed into their account will they be able to control mine? I do not know anyone using this, so I can not test that part out.