How to use your old smartphone as a home security camera

If you have an old smartphone sitting in a drawer , don't sell it just yet or let it go. You can easily turn it into a home security camera , ideal for monitoring entrances, rooms, pets, or even your baby. Thanks to multiple free apps and connectivity features, your old phone can be transformed into a useful and efficient tool for protecting what matters most to you.

This method not only allows you to save money , but also to give a functional device a new use , without having to invest in expensive IP cameras or complex security systems.

Before you begin, make sure your old phone meets a few basic requirements:

• Stable WiFi connection at home .
• Camera in good condition (preferably with good quality on the rear or front).
• Working battery or possibility of keeping it connected.
• Operating system compatible with modern apps (Android 6 or higher, iOS 12 or later).
• Support or base to fix it (it can be a tripod, recycled base or even strong adhesive tape).

Once you have all this, the next step is to install a remote monitoring app .

There are many apps specialized in transforming smartphones into IP cameras. Here are some of the most recommended:

One of the most popular. It allows live monitoring, automatic recording, motion detection, and night vision . You only need to install it on two devices: your old phone will be the camera, and your current one will be the viewfinder.

It allows you to record video to the cloud, use two-way audio, and access recordings from anywhere. Ideal for homes with children or pets.

Turn your phone into an IP camera accessible from any browser, even without installing apps on the viewfinder. Very comprehensive, although more technical.

Designed for Apple devices, this free app offers real-time video, alerts, and limited cloud storage.

1. Fully charge your phone and perform a factory reset , if necessary. This will free up space and remove unnecessary apps.
2. Download the chosen app on both your current and old phone.
3. Create an account or log in with the same session on both devices.
4. Set the old smartphone to “camera mode” and the current one to “viewfinder mode.”
5. Plug your phone into power if you plan to use it for long periods.
6. Place the device at a strategic angle (main entrance, hallway, living room, bedroom). Make sure it has good lighting and a good Wi-Fi signal.
7. Activate features like motion detection, sound alerts, and automatic recording , if the app allows it.

• It's completely free if you already have the phone.
• You can monitor your home in real time from anywhere.
• Ideal for temporary situations: travel, pets, baby rooms.
• Easy to set up and uninstall when you no longer need it.
• Many apps offer free cloud services or local storage .

• Use a power bank if you don't have access to a nearby power outlet.
• Secure your phone with a sturdy case or mount .
• Turn on do not disturb mode so you won't be interrupted by notifications.
• Delete files from time to time to prevent memory from filling up.
• Protect your camera with a password or pattern lock in case of theft.

While this method is practical, it has certain limitations:

• Image quality may be lower.
• The battery degrades with continuous use.
• It does not always include night vision or water resistance.

Therefore, if you need 24/7 outdoor monitoring, infrared vision, or high-definition storage, it's worth considering a specialized IP camera . However, for basic use, this smartphone-based solution is more than sufficient and very functional .

Using your old smartphone as a security camera is a practical, affordable, and eco-friendly way to protect your home without investing in new equipment. With just an app, a good Wi-Fi connection, and a little creativity, you can have remote monitoring and peace of mind at your fingertips . A simple idea that demonstrates how technology can help us intelligently reuse what we already have .