nacn.appThis policy explains how nacn.app (https://nacn.app/) and the games published on its subdomains (together, "this site") handle information about users. Each game's site also has its own privacy policy for that game.
Information you enter in the games
Information you enter in a game (such as your height, weight, and age in Diet Diary, your body fat and how much you can lift in Muscle Diary, your hero's name in Isekai Diary, your personal best and chosen country in Boba Shop Diary, or your birth year and month in Nostalgia Diary) and your game progress are stored only in your browser (localStorage). They are never sent to our servers. Stored data is erased when you clear your browser data.
Advertising
This site uses Google AdSense, a third-party advertising service.
- Third-party vendors, including Google, use cookies to serve ads based on your prior visits to this site and other websites.
- Google's use of advertising cookies enables it and its partners to serve ads to you based on your visits to this site and/or other sites on the internet.
- You can opt out of personalised advertising in Google's Ads Settings. You can also opt out of some third-party vendors' cookies at www.aboutads.info.
For more information, see how Google uses cookies in advertising.
Analytics
This site uses Google Analytics, an analytics tool by Google, to understand how the site is used and to improve the games. Google Analytics uses cookies to collect traffic data. This data is collected anonymously and does not identify you personally.
Some games send events such as starting a game or its results (for example, the world you were reborn in, the week you reached and the type of ending in Isekai Diary) to Google Analytics to learn how people play. The names, weights, or other details you enter in the games are never sent.
You can refuse this collection by disabling cookies in your browser settings. You can also use the Google Analytics Opt-out Browser Add-on. For how this data is handled, see Google's Privacy & Terms.
Information you send through the contact form
Information you send through the contact form (Google Forms), such as your email address, is used only to reply to you and is not shared with third parties except as required by law.
Notice for Singapore users
We handle personal data in line with the principles of Singapore's Personal Data Protection Act (PDPA). Game data stays in your browser, and you can delete it at any time by clearing this site's data. You can withdraw your consent to advertising and analytics cookies at any time by disabling cookies in your browser or using the opt-out options above. To ask to access, correct, or delete information you sent us through the contact form, write to us from About & Contact.
Disclaimer
We try to keep the content and numbers in the games accurate, but we do not guarantee their accuracy or safety. Weight and calorie numbers in Diet Diary, and muscle and one-rep max numbers in Muscle Diary, are estimates and are not medical advice or individual health or training guidance. The amounts and payback times in Boba Shop Diary are also estimates and are not business advice.
We are not responsible for the content of external sites linked from this site, or for any damages arising from the use of this site.
Copyright
The copyright in the text, images, and games on this site belongs to the operator. Please do not reproduce or republish them without permission.
Operator and contact
For the operator of this site and where to send questions about this policy, see About & Contact.
Changes to this policy
This policy may be changed without notice as needed. Changes take effect when they are posted on this page.
Effective date: 22 October 2026 / Revised: 23 October 2026