What are the programs for tracking android (with the consent of the user)?

Question

Android

1) remote control of the device.
-Installation / removal by
-launch by -data exchange -setting
2
)
listening to conversations, reading messages from this phone.
secrecy is not of interest, everything is installed on your phone, those who will use it have agreed. I saw similar programs, but they are paid (you pay for the days of use). need free, or paid, but to buy and no longer pay. If you know more than one, please suggest more. Oh yes, preferably (but not required) without root.
Mandatory to be able to track from another smartphone

Answer 1

https://www.airdroid.com/