Privacy policy
Next Token (next-token.net) has no accounts and does not ask for or store personal information such as names or email addresses. The only things kept on the server are questions left in the question box and the random nicknames and scores of the weekly quiz's class mode, handled as described below.
Ads and cookies
This site shows Google AdSense ads. Third-party vendors, including Google, use cookies to serve ads based on your visits to this and other websites. Google's use of advertising cookies enables it and its partners to serve ads based on your visits to this site and/or other sites on the Internet.
- You can turn off personalised ads in Google Ads Settings.
- You can opt out of third-party vendors' cookies for personalised ads at aboutads.info.
- How Google uses data is explained in How Google uses information from sites that use its services.
Settings kept in your browser
Settings such as the theme (light or dark) and the view switch stay in your browser's storage and are never sent to this site's server. Clearing the site data in your browser removes them.
Your lesson progress (finished lessons, quiz scores and the start date of your own schedule) is also kept only in this browser and is never sent anywhere. To move it to another device, you copy a progress code and paste it there yourself.
Daily game results and streaks, weekly quiz scores, and a class's teacher key or a student's class pass are also kept only in this browser's storage.
Is it true? · API & MCP for developers
Sentences typed into “Is it true?” and requests sent to the API or MCP server are used only to make the answer and are never stored or logged. To stop floods of requests, a scrambled form of the connection address is held briefly in server memory and never saved.
Weekly quiz class mode
When a teacher creates a class, the server (Cloudflare) stores only the class's week, number of questions, creation time and a hash of the teacher key. When a student joins, the server picks a random nickname made of an adjective and an animal (for example “Brave Otter”) and stores that nickname, a hash of the student's class pass, their score (number right) and when they joined and finished. How many students got each question right is kept only as a total for the whole class. We never ask for names, emails or any text from students, and we don't store IP addresses. Every class is deleted automatically 30 days after it's made.
Question box
Questions left in the question box are used only to choose which ones to answer. The server keeps the question text (spacing tidied), its language, the time it arrived and a random ID — never your IP address, browser details, cookies or anything else that could identify you. Questions are never published as typed: the few we choose are reworded so nothing personal shows, and published with an answer written by AI. Questions are deleted automatically after 60 days, and answered ones sooner. Please don't write your name, contact details or school; anything that looks like an e-mail address, phone number or link is refused.
Server logs
The site is served by Cloudflare. For security and reliable operation, Cloudflare may briefly process technical records such as IP addresses and request times.
Contact
Questions about this policy or the site can be left on the author's blog, blog.naver.com/factnotes (in Korean).
Effective Sep 20, 2026 · Last updated Oct 11, 2026