Why I still have phone tracker on my phone

[Android Central Question]

Some weeks ago some one send me link on Yahoo; I downloaded it,after while I was on my smart settings on my Samsung j 7 and I phoned a phone tracker, I restored my phone to factory set-up, but the phone tracker still here even after I reset my phone.dose any one have answer plz

 

[belodion]

What is the name of the app?