I appreciate your question. Because no one here is too much acknowledged, I am giving the answer especially to you.
Listen, Lina, One-time physical access is a necessity for every hardware, cellphones, tablet or in any digital device. Because there is not rocket science or a miracle who will install remotely your desired application or software in the targeted digital device.
Because of your too much concern, I will suggest you something more permanent and authentic spying app which is named as BlurSPY. It will monitor every single digital activity of any android with any operating system. Please visit the given site blew & let me know if it was productive for you.