With the help of the free appFoscam NVR, you can convert your outdated smartphone into a home security camera. You can use it to monitor your house while you're away. The app has a built-in video and audio recorder that you may use to record video while viewing live video streams.

The app can be used as a surveillance camera to watch over your house, or a camera to keep an eye on your pets.

It can serve as a CCTV (closed-circuit television) recorder as well. With High Definition settings, you can find the absolute best for your security viewing.