What's the difference between a 45-degree peep-proof film and a 25-degree one?

The main difference of this article lies in the different anti-peeping effect.

45-degree anti-voyeurism film: Based on the principle of physical optical polarization technology, only the visibility of the front and side faces is within 45 degrees, and the screen content can't be clearly seen from the side faces beyond 45 degrees left and right, so the anti-voyeurism effect is acceptable.

25-degree anti-peeping film: it can effectively protect personal privacy, and the 25-degree anti-peeping effect is good from the side.