Last updated: October 2026
By creating an account or using Zenith (“the Service”), you agree to these Terms of Service. If you do not agree, do not use the Service.
Zenith is an AI-powered learning platform offering spaced repetition flashcards, language conversation practice, and personalised study planning. Features vary by plan (Free and Pro).
You may not use the Service to:
You retain ownership of content you create (flashcards, decks, notes). You grant Zenith a limited licence to store and process that content solely to provide the Service. We do not use your content to train AI models.
You can bring your own material to study from: paste text, upload a file (such as a photo, PDF or audio recording), save a web page, or link or open video in Zenith Watch. When you upload a file, Zenith extracts its text (or, for card generation, creates cards from it) and does not keep the file itself. What is kept is your private study copy: it is visible only to you, is never published or shared with other users, and is not used to train AI models.
Zenith Watch lets you link to third-party video (e.g. a YouTube URL) or upload your own local video and subtitle files to create a dual-subtitle study session. Zenith does not host, store, or redistribute the video itself — linked video streams directly from its source, and locally uploaded video plays only in your browser and is never sent to our servers.
By pasting, uploading, saving or linking any material, you represent that you own it or hold the necessary rights and licences to use it as described here, and that doing so does not disclose another party's confidential, proprietary, or trade-secret material (including an employer's) without authorisation. If the material contains other people's personal data, you are responsible for having a lawful basis to share it with us for your own study. You agree to indemnify Zenith against third-party claims, including copyright and confidentiality claims, arising from material you upload or link.
Zenith responds to notices of alleged copyright infringement under the U.S. Digital Millennium Copyright Act (17 U.S.C. § 512) and will terminate the accounts of repeat infringers. Notices should be sent to privacy@zenithml.com with the subject line “DMCA Notice”. A dedicated copyright contact and designated agent registration with the U.S. Copyright Office are pending; this section will be updated with the registered agent's name, registration number, and a dedicated address once filed.
The Service is provided “as is” without warranties of any kind. To the maximum extent permitted by law, Zenith is not liable for indirect, incidental, or consequential damages arising from your use of the Service.
You may delete your account at any time. We may suspend or terminate accounts that violate these terms. On termination, your data is deleted per our Privacy Policy: Personal learning content is erased from our live database within 30 days, while encrypted disaster recovery backups retain residual copies for up to 90 days before automated lifecycle expiration. Operational and server logs are purged after 90 days. Statutory financial records and VAT transaction invoices are retained for 5 years from fiscal year end under the Danish Bookkeeping Act (Bogføringsloven §10).
If you do not sign in for 18 consecutive months, we will delete your account and the data in it — including your decks, cards, study history, reading history and progress. This is not a penalty: we do not keep personal data longer than we have a reason to.
Before that happens we email your registered address three times over 30 days — 30, 14 and 3 days before the deletion date — telling you the exact date and how to stop it. Signing in cancels the deletion and resets the 18-month clock, as does clicking the “keep my account” link in any of those emails. Either one is enough, and both take one click.
So that these warnings reach you, please keep a working email address on your account. You can change it at any time in Settings, and you can export everything we hold at any time from the same page.
We will never delete an account this way while it has anything of value attached to it. Accounts with an active, paused or Lifetime plan, accounts inside a payment grace period or a period you have already paid for, and accounts holding unspent AI credits are all exempt, however long they stay unused.
We may update these terms from time to time. Material changes will be communicated by email or a prominent notice on the platform at least 14 days before taking effect.
These terms are governed by Danish law. Any disputes shall be resolved in the courts of Denmark.
These are stub terms for development purposes and will be reviewed by legal counsel before the platform accepts paying users.