Avalw Shield

What is Avalw Shield

Avalw Shield is a Mac application, with Windows coming soon, that turns your built-in camera into an intelligent, always-on security layer. It uses on-device artificial intelligence to watch for your face, detect unfamiliar observers, and respond to your physical presence in real time. The entire system is built around three distinct protection layers: Away Lock, which secures your screen the moment you step away; Shoulder Guard, which hides your content when someone else looks at your display; and Face Recognition, which learns your face and unlocks the screen when you return.

What makes Shield fundamentally different from any other security tool is what it does not do. It never connects to the internet. It never saves a single image from your camera. It never collects, transmits, or stores any data about you. Every frame your camera captures is processed entirely in memory, on your device, and discarded within milliseconds. The only output Shield ever produces is a simple integer: the number of faces currently visible. That is the entirety of the information it works with. No cloud. No backend. No account required to try it. Shield comes with a free 15-minute trial per session, and after that you can choose monthly ($29.99/mo), annual ($224.99/yr), or lifetime access ($499). Just a piece of software that sits between your camera and your lock screen and makes one decision over and over: is the right person sitting here?

Away Lock, How It Works

Away Lock is the foundation of Shield's protection. While the application is running, it maintains a lightweight detection loop through your Mac's built-in camera. The loop is simple in concept: it checks whether your face is present in the frame. When your face is visible, nothing happens, your Mac operates normally, exactly as it would without Shield installed. But the moment you stand up, walk to the kitchen, step out for a phone call, or simply turn away from the screen for longer than a configurable delay, Shield recognizes the absence and locks your screen automatically. The default delay is a few seconds, long enough that briefly looking to the side or reaching for your coffee does not trigger a lock, but short enough that an unattended screen is never exposed for more than a moment. You can adjust this delay to suit your environment, a shorter delay for shared offices and public spaces, a longer one for the quiet of your home.

When you return to your desk, Shield identifies your face and unlocks the screen instantly. There is no password prompt. No Touch ID required. No keyboard shortcut to remember. You sit down, and your session is waiting for you exactly as you left it, every window, every tab, every cursor position. The unlock is fast enough that most people stop noticing it within a day. It simply becomes the way their computer works: present means unlocked, absent means locked.

The face recognition system behind Away Lock is not static. It uses an adaptive learning model that improves the more you use it. When you first set up Shield, it captures a baseline understanding of your face. Over time, it adapts to variations, new glasses, a different haircut, a beard you grew over the holidays, changes in lighting throughout the day, slight angle differences depending on how you sit. It learns that all of these variations belong to the same person. This adaptive learning means fewer false locks and faster recognition as days and weeks pass. However, security is never compromised for convenience. If Shield fails to recognize you five times in a row, perhaps because of a dramatic change in appearance or an unusual lighting condition, it falls back to requiring your system password. This threshold exists to prevent unauthorized access in edge cases where the recognition model is uncertain.

Shoulder Guard, Real-Time Protection

Shoulder Guard is Shield's second layer of defense, and it addresses a threat that passwords and encryption cannot: the person standing behind you. Whether you are working in a cafe with your back to the room, sitting in an open-plan office surrounded by colleagues, or answering emails in an airport lounge, your screen is visible to anyone who glances in the right direction. Shoulder Guard watches for exactly this. When it detects an additional face in the camera's field of view, someone leaning over your shoulder, peering from the adjacent seat, or standing behind you, it instantly obscures your screen content. The transition is immediate. Sensitive information, private messages, financial data, personal photos, whatever is on your display is hidden behind a neutral overlay before the observer has time to read anything meaningful.

The moment the additional person looks away or leaves the frame, the overlay disappears and your content is fully visible again. There is no manual toggle, no keyboard shortcut, no notification to dismiss. The entire cycle, detect, hide, recover, happens automatically and continuously. In practice, the experience is remarkably smooth. You might notice a brief visual flash when someone walks past your desk, but it resolves in under a second. For the person who glanced at your screen, they see nothing. The content was already hidden by the time their eyes focused.

Shoulder Guard is more sophisticated than simple face counting. It uses attention detection to determine not just whether another face is present, but whether that face is actively looking at your screen. Someone walking past you in a hallway, facing forward, will not trigger the overlay. But someone who turns their head and directs their gaze toward your display will. This distinction between presence and attention dramatically reduces false triggers in busy environments while maintaining genuine protection when it matters. Additionally, the attention detection system is resistant to spoofing. A photograph held up to the camera will not fool it. A video playing on a phone screen will not fool it. Shield analyzes depth, micro-movements, and gaze direction in ways that require a real, three-dimensional, living face to trigger a response.

Security and Trust, Addressing the Camera Question

Let us address the obvious concern directly: Shield requires access to your camera, and it runs continuously in the background. That is a significant permission to grant to any application, and you are right to scrutinize it carefully. An always-on camera is, by its nature, a sensitive component. You should not trust it to any application without understanding exactly what that application does with the access. So here is the full picture, with nothing omitted.

Zero server dependency. Shield has no backend. There is no API server. There is no cloud service. There is no analytics endpoint. There is no telemetry system. There is no update server that phones home. There is no database anywhere on the internet that stores anything about you or your usage. The application binary runs entirely on your Mac. It was built to be self-contained from the first line of code. This is not a privacy policy promise, it is an architectural fact. There is simply no networking code in the application. It does not know how to connect to anything, because it was never given the ability to do so.

Zero images. This is the part that surprises most people. Despite having camera access, Shield never saves a single image. Not to your hard drive, not to a temporary folder, not to a hidden cache, not anywhere. The camera feed is processed frame by frame in volatile memory. For each frame, Shield runs its detection model and extracts exactly one piece of information: an integer representing how many faces are visible, along with a confidence score for whether one of those faces matches your registered profile. The raw image data, the actual pixels from your camera, is discarded immediately after processing. It never touches your disk. If you were to pull the power cable from your Mac mid-frame, that frame would simply cease to exist. There is no buffer, no queue, no write-behind cache. The frame lives in RAM for a few milliseconds and then it is gone.

Zero network activity. You do not have to take our word for this. Open Activity Monitor on your Mac, find Shield in the process list, and look at the network tab. You will see zero bytes sent and zero bytes received. Not low numbers, zero. You can leave it running for a day, a week, a month. The number will remain zero. If you use a firewall application like Little Snitch or Lulu, Shield will never trigger an outbound connection alert. It will never appear in your firewall logs. It will never attempt to resolve a DNS name. It has no reason to, because there is nowhere for it to send anything. This is verifiable, reproducible, and something we encourage every user to check.

The camera LED. Every Mac with a built-in camera has a hardware-controlled LED indicator that lights up when the camera is in use. This LED is controlled at the hardware level by the system's embedded controller, it is physically impossible for any software, including Shield, to access the camera without the LED turning on. When Shield is actively monitoring, the LED is on. When you quit Shield or disable monitoring, the LED turns off immediately. This hardware guarantee exists specifically so that users can always verify whether their camera is active. It cannot be spoofed, bypassed, or disabled by any application. If you see the LED off, your camera is off.

Screen capture protection. When Shoulder Guard activates and hides your content behind an overlay, that overlay is rendered using a protected window layer. This means third-party screen recording software, screenshot utilities, and remote desktop tools cannot see through it. What is hidden from the person behind you is also hidden from any capture mechanism running on your machine. This is a deliberate security measure to ensure that the protection is comprehensive, not just visual. Additionally, Shield itself never captures or records your screen content, it only reads the camera feed, never the display.

Verify everything yourself. We designed Shield so that every privacy claim is independently verifiable without trusting us. Here is how: first, open Activity Monitor, select Shield, and confirm zero network bytes. Second, install any firewall application and confirm Shield never requests an outbound connection. Third, search your entire filesystem for image files created after installing Shield, you will find none attributable to it. Fourth, watch the camera LED, it will be on when Shield is monitoring and off the moment you stop it. Fifth, disconnect your Mac from the internet entirely and confirm that Shield continues to function with zero degradation, because it was never using the network in the first place. We strongly recommend downloading Shield only from the official Mac App Store. Versions obtained from unofficial sources, file-sharing sites, or third-party download portals may have been modified, and we cannot guarantee their integrity or safety.

How to Set Up Shield

1. Download from the Mac App Store. Search for "Avalw Shield" or follow the direct link from shield.avalw.ai. The download is small and the installation is instant.
2. Grant camera permission. On first launch, macOS will ask you to allow camera access. This is required for Shield to function. Without it, there is nothing to detect.
3. Register your face. Shield will ask you to look at the camera for a few seconds. This creates a local face profile stored only on your device. The process takes less than ten seconds.
4. Shield runs in the background automatically. Once your face is registered, Shield begins monitoring immediately. It sits in your menu bar, quietly doing its job. You do not need to open it, check on it, or interact with it in any way.
5. Customize your preferences. From the menu bar icon, you can adjust the lock delay, the detection sensitivity, and which protection modes are active. You can enable Away Lock alone, Shoulder Guard alone, or both together.
6. That is it. Set it once and forget it. Shield will start automatically when your Mac boots and run silently until you decide to change something. There is no account to create, no extra terms to accept beyond the standard App Store agreement. The free 15-minute trial starts each session so you can experience everything before subscribing.

Day-to-Day Experience

The best way to describe what Shield feels like in daily use is that you stop thinking about it. Within a day or two, the lock-and-unlock cycle becomes invisible. You get up to refill your water, and by the time you have taken two steps your screen is locked. You come back, sit down, and your session is already there. You do not reach for a password. You do not press a button. The screen simply responds to your presence the way a room light responds to a motion sensor. It is not something you do, it is something that happens. Shoulder Guard is similarly transparent. You might notice the screen dim briefly when a colleague walks behind your chair, but by the time you glance up it has already recovered. For most people, the primary evidence that Shield is running is that they never worry about their screen anymore.

Performance impact is minimal. Shield uses your Mac's built-in camera hardware acceleration and Apple's Core ML framework for face detection, which means the processing load is handled efficiently by dedicated silicon rather than your CPU. Battery impact is comparable to having FaceTime running in the background, present, but not something you will notice in a typical workday. CPU usage hovers in the low single digits. Shield does not slow down your applications, does not interfere with video calls, and does not compete with other camera-using apps. When another application takes control of the camera, Shield gracefully pauses and resumes when the camera becomes available again.

What Shield Does NOT Do

Transparency about limitations is as important as explaining capabilities. Shield is a physical-presence security tool, and its scope is deliberately narrow. Here is what it does not do:

• It does not encrypt your files. Shield protects your screen from visual observation. It does not provide disk encryption, file-level encryption, or protection against data extraction from your storage drive. Use FileVault for that.
• It does not protect against remote access. If someone gains remote access to your Mac through malware, a compromised SSH session, or a remote desktop exploit, Shield cannot help. It detects physical faces through the camera, not digital intrusions through the network.
• It requires a camera. If you use an external monitor without a connected webcam, Shield cannot function on that display. It relies entirely on the camera feed to detect faces. No camera means no detection.
• It needs reasonable lighting. Shield works across a wide range of lighting conditions, including dim rooms and indirect light. But in near-total darkness, face detection accuracy decreases significantly. If the camera cannot see your face, Shield cannot detect it. A small desk lamp is usually sufficient.
• It cannot function if the camera is covered. If you use a physical camera cover or tape over your lens, Shield has no input to process. You will need to remove the cover for Shield to work. You cannot have both camera privacy through physical occlusion and camera-based security at the same time, these are mutually exclusive by definition.

Where to Get It

macOS: Avalw Shield is live on the Mac App Store. You can download it now at apps.apple.com.

Windows: A Windows version is in active development and will be coming soon to the Microsoft Store. It will share the same on-device architecture and privacy guarantees as the Mac version.

For more information, visit shield.avalw.ai.

Frequently Asked Questions