Home security systems from Ring, Arlo, or Nest cost $200-500 for hardware plus $3-15 per month for cloud storage. Meanwhile, most of us have old Android phones sitting in drawers doing nothing.
Those old phones have cameras, microphones, WiFi, and batteries. They are complete surveillance systems waiting to be activated. All they need is the right app.
I set up home security using several different Android apps to find which ones actually work as reliable, long-term security solutions.
What You Need for Phone-Based Home Security
- An old Android phone (Android 8.0+)
- A charger or power source near your monitoring spot
- WiFi connection
- A mount, tripod, or just a good spot to prop the phone
That is it. Total cost: $0.
The Apps I Tested
1. Background Camera RemoteStream — Best DIY Security Camera
The only app that records with the screen off, giving you true security camera behavior.
With every other app, your phone sits there with a bright screen showing the camera feed — which screams "camera" to anyone who sees it, attracts attention, and wastes battery. Background Camera RemoteStream turns the screen off. The phone looks like it is just sitting there charging.
- Screen-off recording: 8-12 hours on battery, unlimited when plugged in
- Built-in web server: check the live feed from any device on your network
- YouTube Live streaming: monitor from anywhere in the world (Pro feature)
- No cloud account: footage stays on your phone, not someone else server
- No monthly fees: one-time Pro purchase or free with ads
Setup: Plug the phone in, point it where you want, start recording, turn off the screen. Check the feed from your laptop or other phone by typing the displayed IP address into any browser.
Best for: Front door monitoring, package theft prevention, indoor security, vacation home monitoring
Price: Free (ad-supported) / Pro $9.99/yr or $19.99 lifetime
2. Alfred Camera
Popular phone-as-security-camera app with cloud integration.
Pros: Motion detection alerts, two-way audio, cloud clip storage, easy setup
Cons: Requires account, free tier limited (ads, short clips), premium $4/month, cloud-dependent
Best for: Users who want push notifications for motion events
3. Haven (Guardian Project)
Open-source security app designed for journalists and activists.
Pros: Open-source, motion/sound/vibration detection, encrypted logging, privacy-focused
Cons: Designed for personal device security (detecting tampering), not traditional surveillance, basic camera
Best for: Detecting if someone has entered your room or tampered with your device
4. IP Webcam
Turns your phone into a network-accessible camera.
Pros: MJPEG streaming, motion detection, integrates with PC surveillance software
Cons: Screen stays on, battery drains fast, complex configuration, unstable for long sessions
Best for: Tech-savvy users integrating with existing NVR/surveillance systems
5. AtHome Camera
Home security camera app with companion viewer app.
Pros: Motion detection, push notifications, multi-camera support, scheduled recording
Cons: Requires account, free tier limited, premium subscription for full features, screen stays on
Best for: Users willing to pay monthly for a polished interface with notifications
Comparison
| Feature | BG Camera RemoteStream | Alfred Camera | Haven | IP Webcam | AtHome Camera |
|---|---|---|---|---|---|
| Screen-off recording | Yes | No | No | No | No |
| Battery life (unplugged) | 8-12 hours | 2-3 hours | Varies | 2-3 hours | 2-3 hours |
| Account required | No | Yes | No | No | Yes |
| Monthly fee | No | $4/mo premium | No | No | $3-5/mo |
| Remote viewing | Browser | App | Local | Browser | App |
| Cloud storage | No (local) | Yes | No | No | Yes |
| Motion detection | No | Yes | Yes | Yes | Yes |
Privacy: Why Local Storage Matters
Commercial security cameras upload your footage to company servers. This means:
- Companies can access your footage (and have been caught doing so)
- Law enforcement can subpoena your videos without your knowledge
- Data breaches expose your home footage to the internet
- Your subscription gets cancelled? Your footage disappears
Background Camera RemoteStream keeps everything on your phone. Your footage, your device, your control. Nobody else has access unless you explicitly choose to stream via YouTube.
Cost Comparison Over 2 Years
| Solution | Hardware | Monthly | 2-Year Total |
|---|---|---|---|
| Ring Indoor Camera | $60 | $4 | $156 |
| Arlo Essential | $100 | $8 | $292 |
| Nest Cam | $100 | $8 | $292 |
| Alfred Camera (Premium) | $0 | $4 | $96 |
| BG Camera RemoteStream (Pro) | $0 | $0 | $20 (lifetime) |
| BG Camera RemoteStream (Free) | $0 | $0 | $0 |
My Recommendation
For a simple, private, and free home security setup, Background Camera RemoteStream is the best option. Plug in an old phone, start recording with the screen off, and check the feed from any browser. No accounts, no subscriptions, no cloud.
If you specifically need motion detection push notifications, Alfred Camera fills that gap — but at the cost of privacy (cloud dependency) and a monthly fee.
The reality is that an old Android phone with the right app provides 90% of what a $200+ commercial system offers, at a fraction of the cost.
Have you repurposed an old phone as a security camera? What has your experience been? Share in the comments!
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