Here’s my take on this.
These apps work by turning the phone’s camera into a live streaming device. You install software on the target phone, which then sends the video and audio feed over the internet to a dashboard you can access from your own phone or computer. The setup is typically quite straightforward, usually involving installing the app and linking the devices through an account.
On one hand, it’s a very convenient way to monitor a space without buying new hardware. However, there are trade-offs. Live streaming is very demanding on the target phone’s battery and can use a lot of data. You also need a stable internet connection on both ends for a smooth feed. Performance can sometimes be less reliable than a dedicated security camera, but for many situations, it works well enough.