You can turn an old Android phone into a security camera by installing a camera app on it, pairing it with a web dashboard, and leaving it plugged in on Wi-Fi where it can see what you want to watch. With AndrIoT the whole thing takes about two minutes: install the app, type a 6-letter pairing code, and the live view appears in your browser.
This guide covers the full job, not just the install. You will learn which phones work, how to pair, where to put the phone, how to keep it alive around the clock, and what to expect from the picture. It also says plainly where a phone is a worse choice than a dedicated camera.
Key takeaways
- Any Android phone from Android 4.1 up can work: Android 5+ uses the main app, Android 4.1 to 4.4 uses the Legacy app.
- Setup is a 6-step wizard on the phone plus a 6-letter code (or QR) from the dashboard. Plan on about two minutes.
- Leave the phone on a charger and exempt the app from battery saver, or Android will stop it.
- You watch from a browser. There is no hardware hub and no port forwarding.
- The free demo lets you try the dashboard without signup before you touch your own phone.
Why an old phone makes a decent camera
A phone already contains the parts of a camera system: a lens and image sensor, a microphone, a speaker, a screen, Wi-Fi, a battery that works as a small backup power supply, and a processor that can compress video. Most drawers hold at least one phone that still does all of that and is simply too slow for daily use.
Compared with a cheap plug-in camera, a phone gives you two-way audio, a flashlight, and extras such as light and temperature readings, and it costs nothing to buy because you already own it. What it lacks is mostly physical: no weatherproofing, no infrared night vision, and a cable that has to reach a power outlet.
Which phones work
AndrIoT runs on almost any Android phone. The choice of app depends on the Android version shown in Settings, About phone.
| Android version | App to install | Video type | Notes |
|---|---|---|---|
| Android 5 and newer | Android app | Full live video with audio | Front/back lens, zoom, focus, flashlight, motion detection |
| Android 4.1 to 4.4 | Legacy app | JPEG-frame video | Lighter app for very old phones; a stream of frames rather than smooth video |
Neither app is on Google Play. You download the APK from the links in the box at the end of this article and allow installs from your browser or file manager once. If your phone is older than Android 4.1, it cannot run the app.
Before you start, check three things on the phone: the camera works and the lens is clean, the charging port still holds a cable firmly, and the battery does not look swollen (a bulging back cover means stop and recycle the phone). The 24/7 power guide explains why.
Step-by-step setup
You need a free account or the demo, the old phone with Wi-Fi, and a browser on any other device.
- Open the dashboard. On a laptop or your current phone, go to app.andriot.net and sign in with email or Google. Press Add Phone to see the pairing steps, a 6-letter code and a QR code.
- Install the app on the old phone. Download the Android app, or the Legacy app for Android 4.1 to 4.4. The Devices page in the dashboard also has a Get the AndrIoT app bar with both download buttons. Open the downloaded file and allow the install.
- Run the 6-step wizard. Open the app and follow the wizard. It asks for the permissions it needs (camera and microphone, plus optional ones such as location), then asks for the pairing code.
- Pair. Scan the QR code from the dashboard, or type the 6-letter code. The phone appears in your device list within seconds.
- Keep it alive. The wizard sends you to the battery settings. Exempt AndrIoT from battery saver so Android does not put the app to sleep at night.
- Finish and check. The wizard ends on a done screen. Open the live view in the dashboard and confirm you can see and hear the room.
Prefer to see it first? The live demo opens a virtual device in your browser with no signup, so you can try the controls before installing anything.
Where to put the phone
Placement matters more than any setting. A phone at head height in a corner sees the whole room; a phone on a low shelf sees ankles.
- Height: 2 to 2.5 metres (6 to 8 feet) in a corner covers most rooms. Tilt slightly down.
- Light: point the lens away from windows. A bright window behind the subject turns people into silhouettes.
- Power: pick a spot within cable reach of an outlet. A 2-metre cable is usually enough.
- Mount: a small phone stand, a clamp tripod, or a shelf with a lip. Avoid sticky tape that will peel in summer.
- Privacy: keep it out of bedrooms, bathrooms and anywhere guests expect not to be filmed.
What you can do once it is running
Live video is only the start. These are the features you will use most:
- Live video and two-way audio. Watch, listen, and talk back through the phone speaker. See the two-way audio guide.
- Motion detection with zones. Draw the areas that matter and get an alert when something moves inside them. See motion alerts.
- Front and back lens, flashlight, zoom and focus from the dashboard.
- Tripwire and tamper arm, siren, text-to-speech. Arm the phone so that moving it sets off an alarm.
- Recordings and an activity log kept for your plan retention period (12 hours on the demo, 7 days on Standard, 30 days on Pro).
- Sensors: battery, temperature, light, sound level and GPS. See the sensor hub guide.
- Alerts to Telegram, webhook or MQTT through the Forwarding Hub. See camera alerts.
The home page has the full feature list, and the pricing section shows which plan includes what.
What picture quality to expect
Older phones usually have smaller sensors and slower lenses than current ones, so expect a usable daytime picture and a grainy night picture. Phones do not have infrared night vision. In a dark room the picture comes from whatever light there is, or from the phone flashlight if you switch it on.
| Condition | What you will see | What helps |
|---|---|---|
| Bright room | Clear picture, good for faces at a few metres | Keep the lens clean |
| Dim room | Noisy, soft picture | Add a lamp or night light |
| Backlit window | Dark foreground | Move the phone or close the blind |
| Weak Wi-Fi | Stutter or lower quality | Move closer to the router or lower the bitrate |
Resolution depends on the phone and plan: the demo account streams at 480p, and paid plans go up to 1080p on phones that can deliver it. The dashboard lets you change the bitrate when your connection is weak.
Keeping it running 24/7
Most failed phone cameras fail the same way: Android stops the app to save battery. A few settings prevent nearly all of it.
- Exempt the app from battery saver or optimization (the wizard has a step for this).
- Keep the phone on a charger at all times.
- Turn off any extra battery optimization the phone maker adds on top of Android.
- Give the phone a fixed spot with strong Wi-Fi.
- Turn the screen brightness down to reduce heat.
- Check for a swollen battery every few months.
A phone that sits at 100% on a charger all day ages its battery faster. A smart plug that cuts power at a high level and restores it at a low one solves that. The 24/7 power guide covers it in detail.
Privacy and legal basics
Point the camera at your own space and tell people they are being recorded where the law or common courtesy requires it. Audio is treated more strictly than video in many places. Covert recording of other people is against the AndrIoT Terms. If you plan a camera in a shop, garage or rental, read the legal and privacy notes.
Your video is not used for ads and is not tracked. Live video goes directly from the phone to your browser, and clips are stored only if you turn recording on. Servers are in the EU. The Privacy Policy has the details.
Pros and limits
Pros
- No new hardware: the phone, a cable and Wi-Fi are all you need.
- Two-way audio, flashlight, sensors and GPS are included, which many budget cameras lack.
- Works from any browser, with no port forwarding or hub.
- Gives a drawer phone a useful job instead of making it e-waste.
Limits
- Phone cameras have no infrared night vision.
- Not weatherproof: use indoors or behind glass.
- The phone needs constant power and a reliable Wi-Fi connection.
- Very old phones have weaker cameras and slower processors.
- The app is installed as an APK, not through Google Play.
FAQ
Can any old Android phone be a security camera?
Almost any, from Android 4.1. Android 5 and newer run the full app and Android 4.1 to 4.4 run the Legacy app, which sends JPEG frames instead of smooth video. The camera must work and the phone must stay on power and Wi-Fi.
Do I need a SIM card?
No. The phone only needs a Wi-Fi connection. A SIM or mobile hotspot is useful only for a place without Wi-Fi, such as a garage or car.
Is it free?
The demo is free with one virtual device and no signup. Real phones need a paid plan: Standard is $4.99 per month ($49.90 per year) and Pro is $9.99 per month ($99.90 per year).
Can I watch from outside my home?
Yes. The dashboard is a website, so you can watch from any browser on any network. There is no router configuration.
How long does setup take?
About two minutes once the app is downloaded: sign in, install, run the wizard, and enter the 6-letter code.