Kayefi shows a low, a typical, and a high so you can read a quote before you accept it. Those numbers are planning estimates. They are not a bid, a permit, an inspection, or a promise that a contractor will match them.
You can use every calculator without an account. If you email yourself a copy, that is the note you chose to send. It does not change the price on the page.
City pages carry a review date. After that date, treat the range as old.