There is a monitoring software that starts with a.

Alfred monitoring software is a wireless monitoring housekeeping artifact, which can be turned into a camera with an old mobile phone without buying a special monitoring camera. It is completely free, powerful, supports two-way voice, has small on-site delay, and can also detect on-site movement, which is very practical.

If you are looking for a home security surveillance photography solution, Alfred can definitely meet your needs. You just need to install Alfred on two Android phones, one is set as a camera, the other is set as a monitoring terminal, and both ends log in to the same Google account, and everything is done.