Can people on facebook see that you're online on an iphone?

So when I'm on facebook on my computer people (from my friends list) seem to message me. However, I find this kind of annoying (not to sound anti-social) but usually I'm just checking my news feed quickly when someone messages me and I always have to say something like "gtg" because I do not have much time.

On iPhones, Kindle Fires, iPods, can friends see that you are online?

Tell me about it. I hate whatsup because of this it kills the privacy.

Not if you change your Chat setting to Offline, they can't.

  • Why can't the people I'm texting you, see my emoji emoticons? Okay so, I text both my friends. And they have IPhones. One has an IPhone 4, and the other has a IPhone 5. And I have an IPod touch, why can't they see my emoji emoticons! They said all they see is "*", why is this? Can someone help?!
  • What is the app called where you can see what people do on your iPhone? I was told by a few people that there's some app or something where it hides in the background of your phone and records every thing that happens on your phone? I have people using my phone and they are always sneaky about it so I want to be able to see what they are up to?! Can any one help?!
  • Instagram viewing - can people see if you are viewing them? If friends have an instagram account but I don't have an iPhone/smart phone and can't open my own account, can I view their photos? Also, can they see that I'm viewing their photos? How about through third party sites like webstagram, statigram, etc?
  • If you had a time machine and could see 1 person, who would you go see and why? I would see Aristotle, not only would I be able to bump shoulders with Alexander the Great I would love to pick at Aristotle's brain about philosophy, his views on life what he thinks the meaning is and how he sees the world in a few thousand years, maybe even slip an iPhone in his pocket and see if we have flying cars and floating houses when I come back to the present.