Privacy Policy
Last updated 21 July 2026
duk. does not collect, store, or transmit any personal data. There are no accounts, no tracking, and no advertising.
duk. is a single-player puzzle game that runs entirely on your device. It has no accounts and no login, and the app itself never sends anything over the internet.
What we collect
Nothing at all. duk. collects no personal data, no device identifiers, no location data, and no usage or analytics data of any kind. It uses no cookies, no advertising networks, and no third-party trackers, and it sends no information about you or your play to us or to anyone else.
If you tap a link inside the app, such as the one that brought you to this page, that link opens in your web browser as normal. Anything that happens after that is between your browser and the website you opened.
Your game progress
Your progress, including puzzles played, statistics, and streaks, is saved only on your own device using Apple's on-device storage. This information never leaves your device, is not transmitted to us or anyone else, and is removed if you delete the app.
Third parties
duk. sends nothing anywhere, so there is no third party that receives anything about you. The app does not share data with advertisers or data brokers, and does not use your data for tracking of any kind. This website, which hosts this policy, is served by Cloudflare.
Children
duk. is suitable for all ages. It collects no personal data from anyone, including children.
Changes
If this policy ever changes, the updated version will be posted on this page with a new date above.
Contact
Questions about privacy? Email support@betulanoir.com.
duk. is published by Betula Noir LLC, Austin, Texas. See also the duk. terms of use.