Security Camera CZ

Review by eFreeware

Most homes have a drawer with an old Android phone in it, still capable of taking a decent picture but too slow or too worn to use daily. Security Camera CZ is built around that idea: instead of buying a dedicated camera, you install the app on the spare handset, leave it pointing at whatever matters, and watch the feed from your everyday phone. The app comes from the developer SCamera and sits in the House & Home category.

It has been in this role for a long time. The app was released on April 25, 2018, and has been updated as recently as August 2026. That matters for a tool like this, because a camera you leave running for months depends on the app being kept current as Android itself changes.

The scale is also worth noting. It has over a million installs and a 4.3 average from more than 17,000 ratings. Those numbers don't guarantee anything about your particular setup, but they suggest the app has been used widely enough that its basic approach is workable for a lot of people.

This review looks at what the app does, what it asks of you and where the limits sit.

One phone watches, another phone looks

The core of the app is a two-role setup. On the old phone, you run it in camera mode; on the phone you carry, you run it in monitor mode. The camera side captures a live HD stream, and the monitor side lets you watch that stream from anywhere, which the developer frames as being able to check in even from the other side of the world. It runs on any data connection, whether Wi-Fi or mobile.

The live view is not passive. There is a walkie-talkie function, so you can speak through the camera phone, and you can record what you are seeing while you watch. That combination covers two common jobs at once: checking on a pet or a child, and having something to say to them or to a person at the door.

You are not limited to one camera. The app is designed so you can add as many camera phones as you like, and as many viewer devices as you like, building a small camera system out of hardware you already own. Each camera is a separate feed, and you watch whichever one you need from your personal phone.

The developer pitches this as a replacement for dedicated IP cameras, CCTV setups and surveillance hardware, and claims it offers more features than those devices. That is a marketing claim rather than something I can verify, but the underlying idea is sound: the expensive part of a camera system is usually the camera, and this approach reuses one you already have.

Motion alerts, siren and the details that make it useful

Motion detection is the feature that turns a live feed into something you don't have to stare at. When movement is detected, the app can send alerts, and it can capture what triggered them either as high-resolution still images or as video with sound. The detection is built to resist false alarms, which is the claim that matters most here, since a camera that pings you every time a curtain moves quickly becomes noise.

Around that core sit several controls for tuning when detection should be active and how it should respond. A scheduler lets you limit detection to certain times, near-by detection adjusts how close something has to be, and a siren gives you a way to make noise at the camera end. Zoom, a low light enhancement and a torch help when the room is dim or the subject is far from the lens.

The app also exposes camera-level options where the hardware supports them: you can choose between fish eye and telescopic views, and switch between the front and rear cameras. These depend on what the old phone can actually do, so a basic handset will offer fewer of them.

Beyond the camera itself, there are sharing and storage features. You can share a camera with friends, send footage to Google Drive, run the phone in IP camera mode, and connect the camera to Google Assistant. Recent updates have added playback speed adjustment, the ability to download high-resolution images in a batch, and a switch to stop media being stored in the app's own cloud.

What the app asks of you

The practical requirement is an unused Android phone and a network connection for it. The app runs on Android 4.1 and up, including handsets released as far back as 2012, which widens the pool of spare devices considerably. If your drawer phone still charges and holds a charge, it is probably eligible.

The second requirement is a place to put it. The app is described as working like a portable CCTV camera, installed simply by positioning the old phone where you want it. That means access to power, since a phone running a camera stream for hours will need to stay plugged in, and a view of whatever you want covered.

On cost, the app is free to download and every feature is available in the free version. The paid version carries the same features and functions; the difference is that the free version contains ads and the paid one does not. You are not paying for capability here, so the decision about upgrading comes down to how you feel about advertising in a tool you may leave running for long stretches.

You will also need your own Google Drive space if you want to store footage there, since that is an external service rather than part of the app.

Setting it up without overthinking it

The developer's guidance is that the app works immediately after installation and that the settings are intuitive, with extra features there to discover when you need them. I'd take that as a suggestion to start simple: get the camera phone positioned, confirm the live view reaches your everyday phone, and only then start adjusting detection settings.

The order I would suggest follows the features. Set the camera angle first using zoom and the camera selection options, then deal with lighting using the low light enhancement or torch, and only after that configure motion detection. Tuning alerts before the picture is right tends to produce captures you can't use.

The scheduler and near-by detection are the two settings most likely to decide whether the app is pleasant or irritating. If alerts are firing too often, narrowing the active hours or requiring movement closer to the camera is the natural first move, and the siren is best treated as a deliberate action rather than something to leave armed by default.

For anything you want to keep, recording to Google Drive or downloading the high-resolution images in a batch gives you a copy outside the app. The toggle for stopping media from being stored in the app's cloud is useful if you would rather manage storage yourself.

Where the approach has limits

The main constraint is the hardware you supply. An old phone is not a purpose-built camera: it needs power, it needs a network connection, and its camera and low-light performance are whatever that handset offers. The app can enhance a dim image and switch to the torch, but it cannot create detail the sensor never captured.

The second constraint is the advertising in the free version. The developer is straightforward that the free and paid versions are identical in features and that ads are the difference. For a camera you check occasionally that is a minor annoyance; for one you leave open on a desk all day, it is the kind of thing that pushes people toward paying.

The third is that this is a do-it-yourself arrangement. Positioning, power, network and the tuning of detection all fall to you, and the quality of the result depends on how much care you put into those choices. That is the trade for not buying dedicated hardware.

None of this makes the app a poor choice. It makes it a specific one: a way to get camera coverage from equipment you already own, with the effort that implies.

A spare phone, a charger and a use for both

Security Camera CZ is worth considering if you have an old Android phone sitting unused and a reason to watch a room, a pet, a child or an entrance. The app covers the essentials: a live stream you can watch remotely, two-way audio, motion alerts with image or video capture, and the ability to add more cameras and viewers as you go. The fact that it runs on hardware going back to Android 4.1 means the barrier to trying it is low.

The free version carries ads and there are in-app purchases, but no feature is held back behind payment, so you can evaluate the whole thing before deciding whether the ads bother you enough to pay. That is a fair arrangement for a tool of this kind.

I would recommend it to households with a spare handset and a steady network connection who want camera coverage without buying a camera. If you would rather have hardware designed for the job, with its own mounting and power arrangement, that is a different purchase.

What's new in version 3.14.3

3.14.3 Improved preview loading speed. 3.14.2 Improved video of detected motions (camera update is required). 3.12.1 Added option to adjust playback speed. High resolution images can now be downloaded all at once. 3.11.0 Added the option to disable storing of media to app's cloud. 3.10.2 Improved connection to camera. 3.9.0 Adapted to Android 15. New option to turn off charging notifications. Minor improvements.