"Kerry Wan/ZDNET Considering how much personal information we store on our smartphones, I wouldn't be surprised if the demand for privacy screen protectors is at an all-time high. From bank statements to email credentials to photos and videos, the need to keep our digital footprint safe and secure, especially from the prying eyes of strangers, has never been more necessary. Also: Stop putting your phone screen-side up on the table - why you'll be glad you did Earlier this year, I gave the privacy-enhanced accessory a try, installing on my Galaxy S25 Ultra."
"When I moved my head just a little bit to the left or right, the image quickly faded into black, as if the phone screen wasn't turned on. The two-way privacy filter worked like magic, and for the first time in a long time, I felt comfortable answering work emails and exchanging personal messages while on the New York City subway. Even if a stranger wanted to peek, they couldn't."
A tempered-glass two-way privacy screen protector installed on a Galaxy S25 Ultra with a guide tray for near-perfect placement. Installation left the protector centered and only a few air bubbles that were easily removed. On-axis viewing remained bright, sharp, and vibrant while small head movements quickly rendered the display black to side observers, enabling private use on a crowded subway. The privacy filter reliably blocked side glances, but an unexpected dramatic dimming occurred during video playback. The dimming coincided with auto-brightness behavior, suggesting possible interaction with the phone's light sensor or a shadow over the sensor.
Read at ZDNET
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