Hello all,
I opened this account to share my experience with you. It's up to you to believe or not.
My obsessive disordered ex-girlfriend have been spying me for 1.5 years even though I have Bitdefender installed. She made a deal with a local hacker and that person has produced a local spyware that is not in the database. The spy program remained secretly in one of the Android system file for more than a year. I lived with spyware hiding in system app for over a year. I did scan my phone every day with my premium Bitdefender membership "You are Safe"
How did I understand finally?: Security system app started to send me "clean your phone" notification every 10 minutes. This app never does that repeatedly. Later, Google assistant appeared and showed me a message "go call your mother" and immediately I got "System IU not responding" message.
She was introduced the local hacker as a friend, whom she had done her dirty work in exchange for love or money.
No database can find newly and locally produced malware. Also, not scanning system files is a major security vulnerability.
At least I know who the spy is.
