Terms of Service

Effective Date: 2026-10-03

Amendment Notice (2026-09-26): Article 6 (1) adds 3-month and 6-month period fees for the Basic plan and electronic payment methods (credit card and account transfer), and Article 6 (3) (application of the usage period) and Article 7 (3) (refund on mid-term cancellation of the Paid Plan) are newly established. The 1-month Basic plan fee (KRW 49,000) does not change. The Premium plan is no longer sold and is removed from Article 2 (4) and Article 6 (1). The reasons for the amendment are the introduction of period fees and electronic payment, a clear rule for refunds on mid-term cancellation, and the removal of a plan no longer sold. Article 7 (3) also applies to fees paid from the notice date (2026-09-26) to the day before the effective date. As this amendment neither raises fees nor reduces members' rights and is not unfavorable to users, it takes effect on 2026-10-03 (7 days after the notice date, Article 3 (2)).

Amendment Notice (2026-07-28): The scope of the Service definition in Article 2 (1) and Article 5 (1) has been expanded from "Reading and Writing" to "Reading, Listening, Writing, and Speaking", and the free plan's AI feedback allowance in Article 2 (3) has changed from "once per day (writing and speaking combined)" to "once per day for Writing and once per day for Speaking (each resetting at midnight KST)". In addition, regrading a first resubmission of an already-scored piece is now provided without deducting from your count. As this amendment is favorable to users, it takes effect immediately.

Amendment Notice (2026-07-27): The free plan's AI feedback allowance in Article 2 (3) has changed from "once per lifetime" to "once per day (reset at midnight KST)". As this amendment is favorable to users (free feedback: once per lifetime → once per day), it takes effect immediately.

Article 1 (Purpose)

These Terms govern the rights, obligations, and responsibilities between Unlock Prep (the "Company") and members regarding the use of "Unlock Prep," an AI-based English test scoring service (the "Service").

Article 2 (Definitions)

  1. "Service" means the service that analyzes Reading, Listening, Writing, and Speaking answers submitted by members using Artificial Intelligence (AI) to provide estimated scores and feedback.
  2. "Member" means a user who agrees to these Terms and signs a service use contract with the Company.
  3. "Free Plan" means the plan provided free of charge upon registration. AI-assisted scoring is provided once per day for Writing and once per day for Speaking, based on Korea Standard Time (KST), resetting at midnight. Regrading a first resubmission of an already-scored piece is provided without deducting from your count. Locally scored practice content is available without a usage limit.
  4. "Paid Plan" means the Basic plan provided for a fee.

Article 3 (Posting and Amendment of Terms)

  1. The Company posts these Terms on the initial screen or a linked screen of the Service.
  2. The Company may amend these Terms within the scope that does not violate applicable laws. In the event of an amendment, the Company will announce the effective date and the reason for the amendment from at least 7 days before the effective date. For changes unfavorable to members, the Company will announce them from at least 30 days in advance and notify members individually by email or other means.
  3. If a member does not express an intention to refuse by the effective date of the amended Terms, the member is deemed to have consented to the amended Terms. A member who does not consent may terminate the use contract.

Article 4 (Formation of the Use Contract)

  1. The use contract is formed when a prospective member agrees to these Terms and applies for registration, and the Company accepts the application.
  2. The Company may refuse acceptance or subsequently terminate the use contract in cases of identity theft, entry of false information, application for fraudulent purposes, or other acts that interfere with the Company's operations.
  3. A child under 14 years of age may register only with the consent of a legal representative.

Article 5 (Service Content)

  1. The service includes AI diagnosis and analysis of Reading, Listening, Writing, and Speaking answers, estimated score calculation, grammar/logic feedback, model answers, submission history, and study notes.
  2. Nature of AI Evaluation Results: The scores provided by the service are estimated scores for reference purposes and do not guarantee actual official test scores.
  3. This service is an independent service with no affiliation with ETS. TOEFL is a registered trademark of ETS.

Article 6 (Paid Services and Payment)

  1. The fee for the Paid Plan (Basic plan) is KRW 49,000 per month. Members may choose a usage period of 3 or 6 months and pay for it at once, in which case the fee is KRW 99,000 for 3 months (KRW 33,000 per month, 32% off the 1-month fee, a saving of KRW 48,000) or KRW 189,000 for 6 months (KRW 31,500 per month, 35% off the 1-month fee, a saving of KRW 105,000). Payment can be made through an electronic payment gateway by credit or debit card, account transfer, simple payment services, or other payment methods.
  2. Members must use a payment method registered in their own name, and the responsibility for any problem arising from the unauthorized use of another person's payment method lies with the relevant member.
  3. The usage period of the Paid Plan runs for the number of months paid for, starting when payment is completed and the plan is activated. If a member pays again for the same plan while a usage period remains, the new period starts when the remaining period ends.

Article 7 (Withdrawal and Refunds)

  1. Members can request a full refund within 7 days of payment if they have not used the paid service at all.
  2. If the AI grading service has been used at least once after payment, the provision of digital content is considered to have commenced, and the right of withdrawal may be restricted.
  3. In cases not covered by paragraph 1, if a member who paid a Paid Plan fee (1, 3, or 6 months) requests cancellation together with a refund during the usage period, the Company refunds the amount paid multiplied by the remaining days and divided by the total days, and charges no cancellation penalty. The total days are the number of months paid for multiplied by 30 days (30 days for 1 month, 90 days for 3 months, 180 days for 6 months), and the remaining days are the total days minus the days already used. The days already used are the number of days from the start date of use of that payment to the day before the cancellation request (cancellation on the start date counts as 0 days). The start date of use is the day the usage period of that payment actually began; for a payment applied consecutively under Article 6 (3), it is the day after the previous period ends. Amounts under KRW 1 in the refund are rounded up, and if the days already used are equal to or greater than the total days, the refund is KRW 0. A payment whose usage period has not yet begun is refunded in full. When a refund is made under this paragraph, the period currently in use ends on the date of the cancellation request (an exception to Article 8 (2)). A member who cancels without requesting a refund is governed by Article 8 (2). (Examples: paying KRW 49,000 for 1 month and requesting cancellation with a refund on day 10 of use (9 days used, 21 days remaining) gives a refund of KRW 49,000 × 21 / 30 = KRW 34,300. Paying KRW 99,000 for 3 months and requesting cancellation with a refund on day 8 of use (7 days used, 83 days remaining) gives a refund of KRW 99,000 × 83 / 90 = KRW 91,300. Paying KRW 189,000 for 6 months and requesting cancellation with a refund on day 91 of use (90 days used, 90 days remaining) gives a refund of KRW 189,000 × 90 / 180 = KRW 94,500.)

Article 8 (Termination of the Use Contract and Cancellation of Subscription)

  1. A member may request cancellation of the subscription or withdrawal of membership at any time.
  2. Even if the subscription is cancelled, if a paid usage period remains, Paid Plan benefits are maintained until the end of that period.

Article 9 (Obligations of Members)

Members must not engage in acts such as identity theft, abnormal use of the Service, submission of content to which they have no rights, or unauthorized reproduction or distribution for commercial purposes.

Article 10 (Rights to Content)

  1. The copyright of the answers submitted by a member belongs to the member.
  2. The Company may use submitted content within the scope of providing the Service, and use for the purpose of quality improvement is limited to cases where separate consent has been obtained from the member.

Article 11 (Limitation of Liability)

  1. The Company is not responsible for the outcome of decisions made by the member based on the AI evaluation results.
  2. The Company's liability for damages, unless due to intent or gross negligence, is limited to the total amount paid by the member to the Company in the last 3 months.

Article 12 (Dispute Resolution and Governing Law)

  1. These Terms are interpreted in accordance with the laws of the Republic of Korea.
  2. In the event of a dispute, a lawsuit may be filed with the competent court under the Civil Procedure Act.

Business Information

  • Name: Unlock Prep / Representative: Kwon Hyukjoon
  • Business Registration No.: 357-09-03643
  • Address: 489 Muyeok-ro, Uichang-gu, Changwon-si, Gyeongsangnam-do, 2F #28, Republic of Korea
  • Contact: hq@unlockprep.com / 010-4017-1504