Last updated: June 12, 2026
Developer: Yurii Dobrovolskyi (“we”, “us”, “our”)
Contact: lexiumcards@gmail.com
Important provisions for consumers: Please pay special attention to sections 4.4–4.6 (Subscription auto-renewal and cancellation), 9 (Disclaimer of warranties), 11 (Account deletion), and 14 (Right of withdrawal).
1.1. Please read these Terms of Use and the Privacy Policy (collectively, the “Terms”) carefully before using the Lexium Cards application (the “App”). The App is available on the App Store and Google Play.
1.2. By creating an account or using the App, you agree to be bound by these Terms. If you do not agree, you must not use the App.
1.3. You must be at least 13 years old to use the App. By using the App, you represent that you are at least 13 years old.
2.1. Lexium Cards is a mobile application for learning vocabulary in any language pair using flashcards and spaced repetition.
2.2. Key features include:
3.1. To use the App, you must create an account using Google Sign-In or Apple Sign-In.
3.2. You are responsible for maintaining the security of your account and for all activities that occur under your account.
3.3. You must provide accurate information when creating your account. You may not create an account on behalf of someone else without their permission.
3.4. You must keep your device and the App updated. We are not responsible for issues caused by using outdated versions.
3.5. We reserve the right to suspend or terminate your account if you violate these Terms.
4.1. The basic version of the App is provided free of charge.
4.2. Premium features (“Lexium Pro”) are available through paid subscriptions. Premium features include dark theme, studio-quality text-to-speech voices, typing mode for study sessions, and all future Pro features. Pricing and subscription terms are presented to you in the App before any purchase is made.
4.3. Payments for Premium features will be processed through the App Store or Google Play. Payment terms are subject to the respective store operator’s terms and conditions.
4.4. Auto-renewal. Subscriptions automatically renew unless you cancel at least 24 hours before the end of the current billing period. Payment will be charged to your App Store or Google Play account upon confirmation of purchase and at the start of each renewal period.
4.5. Cancellation. You may cancel your subscription at any time through your device’s subscription settings (App Store → Settings → Subscriptions, or Google Play → Subscriptions). Cancellation takes effect at the end of the current billing period. No refunds are provided for unused portions of the current period.
4.6. Immediate access. By purchasing a subscription, you expressly request that Premium features be made available to you immediately. You acknowledge that this may affect your right of withdrawal as described in Section 14.
5.1. “User Content” means all content you create within the App, including decks, collections, flashcards, and any text you enter.
5.2. You retain ownership of your User Content. By using the App, you grant us a non-exclusive, worldwide license to store, process, and display your User Content solely for the purpose of providing the App’s functionality to you.
5.3. You are responsible for your User Content. You must not create content that:
Violates any applicable law or regulation
5.4. We reserve the right to remove User Content that violates these Terms without prior notice.
5.5. Reporting illegal content. If you believe that any content in the App is illegal or violates these Terms, you may report it by emailing lexiumcards@gmail.com. Your report should include a description of the content, why you believe it is illegal, and your contact information. We will review the report and take appropriate action without undue delay.
6.1. The App, including its design, code, graphics, articles, AI-generated content, audio files, and all other materials created by us, is the intellectual property of Yurii Dobrovolskyi and is protected by copyright and other intellectual property laws. This does not extend to third-party content described in section 6.5.
6.2. You may not:
Remove or alter any copyright or proprietary notices
6.3. Articles and reading materials provided in the App are created by or licensed to us. Unauthorized reproduction or distribution is prohibited.
6.4. IP infringement claims. Should a third party claim that the App or your use of the App infringes their intellectual property rights, we are solely responsible for the investigation, defense, settlement, and discharge of any such claim. Store operators (Apple, Google) have no responsibility for IP infringement claims related to the App.
6.5. Third-party content. The in-app library includes content owned by third parties — embedded YouTube videos and the subtitles and transcripts associated with them, displayed for language-learning purposes. Such content remains the intellectual property of its respective rights holders, and nothing in these Terms grants you or us any ownership of it. Your use of third-party content is limited to viewing it within the App. See also section 9.4 regarding embedded video content.
7.1. The App uses artificial intelligence services (Google Gemini, Google Cloud Translation, Google Cloud Text-to-Speech) to provide translations, word analysis, and pronunciation.
7.2. AI-generated content is provided “as is” and may contain inaccuracies. We do not guarantee the accuracy, completeness, or reliability of AI-generated translations, word analyses, or pronunciations.
7.3. You should not rely on AI-generated content as the sole source of information for critical or professional purposes.
8.1. You agree not to:
9.1. The App is provided “as is” and “as available” without warranties of any kind, whether express or implied.
9.2. We do not warrant that:
The App will meet your specific requirements
9.3. The App depends on third-party services (Supabase, Google APIs, Mixpanel, Sentry, etc.). We are not responsible for their availability, performance, or any changes they make to their services.
9.4. Embedded video content. The in-app library includes videos hosted by YouTube and played via Google’s official embedded IFrame player. We do not host, control, or modify these videos and we are not responsible for their availability, accuracy, or content. By watching an embedded video you also agree to YouTube’s Terms of Service and Google’s Privacy Policy. Videos may be removed by YouTube at any time without notice.
9.5. If you are an EU consumer using paid Premium features, your statutory rights under applicable consumer protection laws (including the EU Digital Content Directive 2019/770) are not affected by this disclaimer. You retain all mandatory consumer rights provided by the law of your country of residence.
10.1. To the maximum extent permitted by applicable law, we shall not be liable for any indirect, incidental, special, consequential, or punitive damages, including but not limited to:
Any damages arising from your use of or inability to use the App
10.2. Our total aggregate liability arising out of or relating to these Terms shall not exceed the amounts you have paid to us (if any) in the 12 months preceding the event giving rise to the claim.
10.3. Nothing in these Terms excludes or limits liability that cannot be excluded or limited under applicable law, including liability for fraud or gross negligence.
11.1. You may delete your account at any time through the App’s Settings screen.
11.2. Upon account deletion:
Deleting your account does not automatically cancel active subscriptions. You must cancel subscriptions separately through your App Store or Google Play subscription settings before deleting your account
11.3. We may terminate your account if you:
Engage in fraudulent or unlawful activities
11.4. Upon termination:
12.1. The App is distributed through the App Store (Apple Inc.) and Google Play (Google LLC), collectively “Store Operators.” Your use of the App is also subject to the terms and conditions of the respective Store Operator.
12.2. License scope. If you download the App from the App Store, it may only be used on Apple-branded devices that you own or control, or through accounts linked by Family Sharing.
12.3. Maintenance and support. We are solely responsible for providing any maintenance and support services for the App. Store Operators have no obligation to provide maintenance or support.
12.4. Warranty. To the extent we have not excluded any warranty, we (not the Store Operators) are responsible for it. If any warranty is breached, you may contact the Store Operator for a refund of the download price (if any). Store Operators have no other warranty obligations regarding the App.
12.5. Claims. We, not the Store Operators, are solely responsible for addressing any claims you may have relating to the App, including product liability claims, claims of non-conformance with legal requirements, and claims under consumer protection or similar legislation.
12.6. Intellectual property. We, not the Store Operators, are solely responsible for the investigation, defense, settlement, and discharge of any third-party intellectual property infringement claims related to the App.
12.7. Sanctions compliance. You represent and warrant that you are not located in a country subject to a U.S. Government embargo or designated as a “terrorist supporting” country, and you are not listed on any U.S. Government list of prohibited or restricted parties.
12.8. Third-party beneficiaries. Store Operators and their affiliates are third-party beneficiaries of these Terms and have the right to enforce them against you.
12.9. In the event of a conflict between these Terms and the Store Operator’s terms that cannot be resolved, the Store Operator’s terms will prevail.
13.1. We may update these Terms from time to time. When we make significant changes, we will notify you through the App at least 30 days before the changes take effect.
13.2. If you continue to use the App after the updated Terms take effect, you agree to be bound by the revised Terms.
13.3. If you do not agree with the updated Terms, you must stop using the App and delete your account.
14.1. If you are a consumer in the European Union, you have the right to withdraw from a paid subscription within 14 days of purchase, without giving any reason.
14.2. To exercise your right of withdrawal, you must inform us by email at lexiumcards@gmail.com with a clear statement of your decision to withdraw.
14.3. If you have requested that Premium features be made available immediately upon purchase (Section 4.6), you acknowledge that you may lose your right of withdrawal once the digital content has been fully provided. If withdrawal is permitted, we will refund the proportionate amount for the unused portion of the subscription period.
14.4. Refunds will be processed within 14 days of receiving your withdrawal notice, using the same payment method as the original purchase.
15.1. We shall not be liable for any failure or delay in performance of the App caused by circumstances beyond our reasonable control, including but not limited to: natural disasters, war, terrorism, cyber-attacks, epidemics, government actions, power or telecommunications failures, or disruptions to third-party services.
15.2. We may terminate these Terms if a force majeure event continues for a period of 30 days or more.
16.1. These Terms are governed by and construed in accordance with the laws of Ukraine, without regard to its conflict of law provisions.
16.2. Any disputes arising from or relating to these Terms shall be resolved in the courts of Ukraine, subject to any mandatory provisions of applicable law that require disputes to be resolved in another jurisdiction.
16.3. If you are a consumer in the European Union, you also benefit from any mandatory provisions of the law of your country of residence. Nothing in these Terms affects your rights as a consumer under applicable EU law.
16.4. For EU residents, the European Commission provides an online dispute resolution platform at https://ec.europa.eu/consumers/odr.
17.1. Severability. If any provision of these Terms is held invalid or unenforceable by a court of competent jurisdiction, the remaining provisions shall remain in full force and effect.
17.2. Assignment. We may assign or transfer these Terms, in whole or in part, without restriction. You may not assign or transfer any rights or obligations under these Terms.
17.3. Entire agreement. These Terms, together with the Privacy Policy, constitute the entire agreement between you and us regarding the use of the App.
17.4. Notices. We may send you notices via email or through the App. Notices from you to us must be sent to lexiumcards@gmail.com.
If you have any questions about these Terms, please contact us:
Email: lexiumcards@gmail.com
Developer: Yurii Dobrovolskyi