Privacy Protector

A privacy protector is a microlouver filter, not a MagSafe case and not a browser extension. On phones it is usually adhesive tempered glass. On laptops and monitors it is often a framed or tab-mounted film cut to a 16:9 diagonal. Side seats go dark; you pay with a dimmer head-on image.

• Phone or tablet adhesive glass versus a removable 16:9 monitor filter
• A tight 30-degree cone versus a wider 60-degree office filter
• Matte anti-glare louvers versus glossy glass that still mirrors lights

Measure the visible screen, not the bezel, and confirm the aspect ratio so the filter does not float over the camera or miss the corners.