know all offline facebook friends maybe they are online

hi dear blog readers ,
in this post i will give you a secret of a facebook method can help you to know all hiden facebook friends in offline mode.
to do this you can use a facebook app called : my offline friends
this app is easy to use it just install it in you facebook account . and it will automaticly provide all online friends maybe they are hidden in offline mode.
this app can help you also to view your online friends if you are in offline mode .
app link : click here