BlockAxis does not ask for an account or store your calculator inputs on a server. Your language preference is stored locally in your browser. Quiz answers remain in page memory and disappear when the page is reloaded.
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The selected day or night appearance is saved in this browser, alongside the language preference. Quiz answers are processed locally and are not saved by the lesson quizzes. Clearing preferences restores the day appearance.
Optional educational videos are hosted by YouTube. A player connects to YouTube only after you select Load the video; the provider then receives connection information and applies its own privacy terms. You can use every lesson without loading a video.