You can track Facebook in iPhone without letting others know by using SpymasterPro for Facebook. It is the perfect software for you to do this task. It also helps you to find out who is following your loved ones on Facebook and how long they have been following them. SpymasterPro for Facebook provides a detailed report about others' activities so that you can answer all the questions related to spying on Facebook. You can also see all the activities of your friends and see which of them are active on Facebook.