I would look strange on your body,
but not on your phone.
You appreciate me most
when you're not home.
There's not enough clues,
so let's make this a twofer...
I watch what you do,
and I have no future.
What am I?
Edit History: Started with four lines written in third-person. It was too vague so I made small edits and adjusted the title to match. It was too open-ended so I added a second half with more clues. Also added the "wordplay" tag.