A software program, like keylogger or other program, which could install into Android, iPhone or other smart phone. The installation should be remotely, just like SMS to the target phone, and the user should not be able to detect.
I have created many keyloggers, from windows keyloggers to mobile keyloggers and even one keylogger for FreeBSD. Contect me if you want a cooperation on this project. Regards, c0ffee.