Terms of Service

Welcome to Mathiter, operated by Elicova (hereinafter "the Company," "we," "us," or "Elicova"), a sole proprietorship registered in the Republic of Korea. These Terms of Service ("Terms") govern your access to and use of the Mathiter website (mathiter.com), web and mobile applications, and all related products and services (collectively, the "Service").

By accessing or using the Service, you agree to be bound by these Terms. These Terms cover the Mathiter learning app. The Company also operates Mathiter Tutoring, a private tutoring service offered in the Republic of Korea only and governed by the Korean-language Terms of Service.

• Company: Elicova, a sole proprietorship in the Republic of Korea, represented by Sejun Park.
• Service: The Mathiter learning app and all related products operated under the Mathiter brand.
• Member: Any person who agrees to these Terms and uses the Service. For minors, the term includes their legal guardian.
• Billing Key: An auto-billing token issued by our payment processor (Toss Payments) in lieu of full card details.

The Service is available to individuals who are at least 13 years of age. Users under 18 must have consent from a parent or legal guardian. A parent or guardian who registers or pays on behalf of a minor accepts these Terms on behalf of the minor and is responsible for the minor's use of the Service.

The Company reserves the right to modify, suspend, or discontinue any part of the Service at any time, with or without notice. The Company may verify your age, identity, or parental consent and suspend accounts that fail verification.

To access certain features, you must create an account. You agree to provide accurate, current, and complete information at registration and to keep your account information updated.

You are responsible for maintaining the confidentiality of your password and for all activities that occur under your account. You must notify the Company immediately of any unauthorized use of your account. The Company is not liable for any loss arising from your failure to secure your credentials.

The Company provides two independent service tracks:

• Mathiter learning app (SaaS track): A self-directed learning toolkit including adaptive diagnostic testing, AI-powered coaching, problem practice, video lessons, and a parent dashboard. Available in free and paid tiers, governed by B.

Members may use either or both tracks. Each track has separate billing, refund, and operational rules. Track transitions are governed by C.

The provisions of this B apply exclusively to the Mathiter learning app track.

The Mathiter learning app is provided in two tiers:

• Free users: Basic features available indefinitely without charge, subject to a daily usage cap (problems, AI coaching, lessons, etc.). Automatically applied upon registration; no payment method required.
• Paid users: All features available without limit for KRW 34,900 per month (including applicable tax), charged on a recurring monthly basis.

The Company may modify the scope of free/paid features and daily limits as needed for service operation, with material changes announced in advance via site notice or email.

Paid subscriptions are automatically charged each month to the Member's registered payment method (billing key). Subscriptions auto-renew until canceled, on the same day of the month as the first payment.

Members may cancel anytime via My Page. After cancellation, paid features remain accessible until the end of the current billing period. Pro-rated refunds are not provided.

The Company will notify Members at least 30 days in advance of any price change. Members who do not agree may cancel before the next renewal.

If a recurring charge fails, the following procedure applies:

1. Day 0 (first failure) — Member and Company notified immediately by email. Automatic retry scheduled in 24 hours.
2. Day 1 (second failure) — Member and Company notified by email. Automatic retries cease and a 7-day grace period begins. Paid features remain accessible during grace.
3. Day 4 — Mid-grace reminder email.
4. Day 7 — Grace period ends. If payment is not restored, the Member is automatically downgraded to free tier and the daily usage cap is applied.

For Members downgraded to the free tier, learning data (problem history, progress, weak topic analysis, notes, etc.) is processed as follows:

• Day 7 ~ Day 37 (30 days) — Learning data preserved as-is, accessible within free-tier limits.
• Day 37 — Learning data enters dormant state. The Member is notified that "90 days remain for recovery." Data is safely stored in backup.
• Day 67 — "60 days remain for recovery" notice email.
• Day 97 — "30 days remain for recovery" final warning email.
• Day 127 — Backup permanently deleted. Re-subscription cannot restore the data.

Members may re-subscribe anytime before Day 127 to instantly restore all learning data. This policy is designed to avoid indefinite data retention while giving Members ample time to decide.

All content on the Service — including text, graphics, logos, images, audio, video, software, math problems, explanations, lessons, curriculum materials, and 1:1 coaching content — is owned by Elicova or its licensors and is protected by copyright, trademark, and other intellectual property laws.

You may not copy, modify, distribute, sell, license, or create derivative works from any content on the Service without the Company's express written permission, except for personal learning use within the Service.

You may submit content to the Service, including responses to practice problems, notes, feedback, and other materials ("User Content"). You retain ownership of your User Content but grant the Company a worldwide, non-exclusive, royalty-free license to use, display, store, and analyze your User Content in connection with operating, improving, and providing personalized learning for you.

You represent that you have all necessary rights to submit your User Content and that it does not violate any third-party rights.

The Service includes AI-powered features such as adaptive diagnostic testing, personalized learning coaching, automated explanations, and solution analysis ("AI Features"). You acknowledge and agree:

• AI-generated content is provided for educational purposes only and may contain inaccuracies or errors.
• AI outputs are not a substitute for professional academic advice or guidance from a licensed educator.
• The Company may use de-identified or aggregated data from AI Feature interactions to improve the Service.
• The Company does not use your personal AI interaction data to train third-party AI models.

You agree not to:

• Use automated tools, bots, scrapers, or data mining techniques to access or collect data from the Service.
• Attempt to gain unauthorized access to any part of the Service, other Members' accounts, or the Company's systems.
• Reverse engineer, decompile, or disassemble any software used in the Service.
• Use the Service for any unlawful purpose or in violation of any applicable law.
• Submit false, misleading, defamatory, or offensive content.
• Interfere with the proper functioning of the Service or impose an unreasonable load on the infrastructure.
• Use content from the Service to train AI or machine learning models without written authorization.
• Distribute learning materials from the Service externally without the Company's prior written consent.

The Company operates the Service through the following third-party providers; Member information may be entrusted to these providers. See the Privacy Policy for details.

• Payment processing: Toss Payments Co., Ltd. — payment processing and billing key issuance.
• Infrastructure/Database: Google LLC (Firebase Hosting, Cloud Run, Firestore).
• Web hosting (landing): Vercel Inc. (mathiter-homepage).
• Domain registration: Whois Corp.

THE SERVICE IS PROVIDED "AS IS" AND "AS AVAILABLE" WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT. THE COMPANY DOES NOT WARRANT THAT THE SERVICE WILL BE UNINTERRUPTED, ERROR-FREE, OR SECURE, OR THAT ANY DEFECTS WILL BE CORRECTED.

The Company makes reasonable efforts to support student learning improvement but does not warrant specific test scores, admissions outcomes, or academic achievement.

TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE COMPANY SHALL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES ARISING FROM YOUR USE OF THE SERVICE. THE COMPANY'S TOTAL LIABILITY SHALL NOT EXCEED THE AMOUNT YOU HAVE PAID TO THE COMPANY IN THE SIX (6) MONTHS PRECEDING THE CLAIM. THE FOREGOING LIMITATION DOES NOT APPLY TO DAMAGES CAUSED BY THE COMPANY'S WILLFUL MISCONDUCT OR GROSS NEGLIGENCE.

You agree to indemnify and hold harmless the Company, its representative, employees, and agents from any claims, damages, losses, or expenses (including reasonable attorney's fees) arising from your use of the Service, your violation of these Terms, or your violation of any third-party rights.

You may request account termination anytime via My Page. The Company may, with or without prior notice, suspend or terminate your access to the Service if: (1) you violate these Terms, (2) your payment failure persists for 7 or more days, (3) you use the Service fraudulently, or (4) required by law.

Provisions regarding intellectual property, disclaimers, limitation of liability, and indemnification shall survive termination.

These Terms shall be governed by and construed in accordance with the laws of the Republic of Korea. Any disputes arising from these Terms or the Service shall first be resolved through good-faith negotiation between the Company and the Member. If negotiation fails, the court with jurisdiction over the Company's business address (Suwon District Court) shall have exclusive jurisdiction as the court of first instance.

The Company may update these Terms from time to time. Material changes will be announced via in-Service notice and email to registered Members at least 7 days in advance (or at least 30 days in advance for changes adverse to Members), and the "Effective Date" above will be updated. Continued use of the Service after the effective date constitutes your acceptance of the updated Terms.

Contact Channels:

• General inquiries: contact@mathiter.com
• Service / billing inquiries: support@mathiter.com
• KakaoTalk Channel: @mathiter (click to open a 1:1 chat)
• Website: https://mathiter.com