Dig out that dusty phone from your junk drawer. Your old phone can be repurposed as a fully functional security camera in under five minutes. With just a few tweaks and the right apps, you can give your old device a new lease on life. One of the most practical uses is turning it into a home security system, saving you the money you'd spend on actual cameras and the hassle of recycling older devices. There are no special skills needed, and best of all, you don't need to wire anything except the phone's charger.

To get started, you'll need a few minutes of free time, your old phone(s), a stable internet connection, and the Alfred Camera app. The app works on both iOS and Android and is free, cross-platform, and easy to set up. On your main phone, open the app, sign up, then select "Prepare another device as your camera screen" and choose Mobile Device. On your old phone, open the app and pair both devices by logging into the same account or scanning a QR code. Set your main phone to Viewer and your old phone to Camera.

Alfred Camera doesn't stop at live video; the free plan includes a full-volume siren alarm, low-light mode for nighttime viewing, two-way talk, and the ability to switch cameras or rotate orientation. The Standard plan starts at $5.99/month and allows up to four cameras, HD streaming, an eight-hour recording loop, 14-day cloud storage, and person/vehicle/pet detection. Premium Plus ($7.99/month) removes the camera limit and adds full HD, unlimited recording, and 30-day cloud storage.

If there's one thing common on most old phones, it's probably bad battery life. Position your new security camera near an outlet and leave it plugged in at all times. A phone stand is also a good addition for flexibility. If you don't have important information on the old device, factory reset it to free up storage and clear old accounts. Check your phone's battery optimization settings and disable them for the Alfred Camera app to prevent the OS from closing the app in the background. For outdoor placements, consider weather-proofing it with a clear, waterproof case or mounting it just inside a window instead of directly outside.