Privacy Policy
Effective June 12, 2026
The short version: Yadoku Jr. collects nothing. Not from kids, not from grown-ups, not from anyone.
What we collect
Nothing. Yadoku Jr. has no accounts, no sign-in, no analytics, no crash reporting, no advertising, and no third-party software of any kind. The app never asks for a name, an email address, a photo, a location, or anything else.
The app works completely offline
The iOS and Android apps make no network connections at all. Once the app is on your device, nothing goes in or out. There is no server receiving anything, because the app never sends anything.
Settings stay on your device
The app remembers exactly two things: which color theme you picked and whether you prefer light or dark mode. Both are stored only on your device (in your browser's local storage if you play on the web). They never leave it, and deleting the app or clearing your browser data removes them.
No ads, no purchases, no links out
Yadoku Jr. is free. It shows no advertising, sells nothing, offers no in-app purchases, and contains no links that leave the app. There is nothing behind a parental gate because there is nothing that needs one.
The website
If you play in a browser at jr.yadoku.app, our hosting provider (Vercel) handles the web request the way every web host does, which involves processing your IP address for the moment it takes to send you the page. We do not use, store, or look at that information, and the site sets no cookies and runs no trackers.
Children's privacy
Yadoku Jr. is made for kids, and it is designed to comply with children's privacy laws (including COPPA in the United States) the simplest way possible: by collecting nothing at all. Since no personal information is ever collected, there is nothing to consent to, review, or delete.
Changes to this policy
If this policy ever changes, the new version will be posted at this address with a new effective date. Since the app's whole design is "collect nothing", we do not expect it to change much.
Contact
Questions? Email support@yadoku.app and mention Yadoku Jr.