As previously mentioned, frosted film is great for privacy, but it's not a fix for every glass problem. Cracked or deeply scratched glass needs repair first, since film won't hide the damage or stop a crack from spreading. A fogged, failed double-pane seal is a glass replacement too, not something film should cover up.
It's also the wrong tool for two other goals. If you want heat and UV kept out, that's sun control film. If you want glass that holds together in a break-in, that's security window film. Again, frosted film does privacy and looks, not those jobs.
And if there's old film peeling on the glass now, we won't lay frosted over it. Tint removal comes first, then frosted goes on clean. Skip that and the new film bubbles within weeks.
Have questions? We're happy to help.