Terms of use

Quad Encode helps you study: it finds learning material for a subject, gives you a place to take notes, and turns those notes into flashcards on a spaced schedule. Using the site or creating an account means you accept these terms. If you do not accept them, do not use the service.

You get a personal, non-transferable right to use Quad Encode. There is a free tier with limits on how much you can store and generate, and a paid Pro tier that raises them. Pro costs $5.99 a month or $39 a year, billed through Stripe. Cancel any time; access lasts until the end of the period you paid for, then the account returns to the free limits. Keep your password to yourself and tell us if you think someone else has it. You are responsible for what happens under your account.

Cancel from your account settings whenever you like. Cancelling stops the next charge and leaves your access running until the period you already paid for ends, so there is nothing to refund for the time you keep. We do not refund partial months or partial years by default. If Pro was charged by mistake, or it did not work and we could not fix it, send a message within 30 days of the charge and we will refund it. Notes, cards and paths stay on the account after a downgrade; only the higher limits go away.

Notes, imports, uploads and the cards built from them belong to you. By using a feature you give us just enough permission to run it: storing a note means we store it, and asking for AI generation or a PDF export means the note's text goes to the AI provider that does the work. That permission ends where the feature ends. We do not use your content to train models, sell it, or show it to anyone else. A deck's share link works the same way: it exists because you created it and stops working when you delete it. Anyone holding the link sees that note's cards and nothing more.

The app itself, its code, design and name, stays ours. Only import material you have the right to use: course content you do not own, leaked exam questions and question-bank dumps do not belong here, and we can remove them. The same goes for sharing: a link publishes your cards to whoever holds it, so only share material you have the right to publish.

What we store, who processes it, and how to delete it is the privacy policy. The short version: no ads and no advertising trackers, analytics only if you accept the banner, and deleting your account removes your data, files included.

Parts of the product run on other people's services: AI providers generate cards, search providers find learning material, videos play in YouTube's embedded player, and an email provider delivers anything you send through the contact form. When bot protection is enabled, a verification service checks that the public search and the contact form are being used by a person rather than a script. When error reporting is enabled, an error-reporting service receives reports of what broke. Learning paths also link out across the open web. Those services and sites have their own terms, and ours stop at their edge.

The hands-on lab and the SQL box are other people's software, running on your machine rather than ours. The emulator is v86 (BSD 2-Clause), the machine it boots is a Linux kernel with a BusyBox userland (GPL-2.0), its firmware is SeaBIOS and VGABIOS (LGPL), and the SQL box is SQLite compiled to WebAssembly by sql.js. Each keeps its own licence and its own authors' terms; ours do not replace them. Questions about any of it, including how to get the source for a component: send a message.

The service is provided as is, without warranties of any kind. It is still being built, and may change, break, or gain and lose features without notice.

Generated cards, quizzes and learning paths come from AI models and ranked search results. They can be outdated, incomplete, or simply wrong. Check what matters against your own material before an exam depends on it. The product is built around you re-explaining things in your own words for exactly this reason.

The hands-on labs are practice, not the exam. The Linux machine they boot is a small emulated box with a limited set of tools, and it is not the environment any vendor tests you in. Verify checks the specific thing that lab asked for. Passing it says you did that, and nothing about whether you will pass a certification.

To the extent the law allows, we are not liable for losses that come from relying on the service, including a missed exam question a generated card got wrong.

You can leave whenever you want: account deletion is self-service in settings and takes your data with it. We can suspend or remove accounts that abuse the service, which means scripting against it, scraping it, probing other accounts, or working around the rate limits and quotas that keep the service running for everyone.

If these terms change, the date at the top changes with it, and continuing to use the service after a change means you accept the new terms. Questions: send a message.