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Terms of Service

Effective date: June 1, 2026 (amended April 20, 2026)

This English translation is provided for your convenience. The Korean version is the legally binding text.

Article 1 (Purpose)

These Terms of Service set forth the conditions and procedures governing use of the sermon-passage research report service provided by Didymus Lab (the "Service"), as well as the rights, obligations, and responsibilities of members and the Service operator.

Article 2 (Definitions)

  1. "The Service" means the entirety of the sermon-passage research report production and delivery service provided by the Company.
  2. "Member" means a person who registers through Kakao account authentication and uses the Service.
  3. "The Company" means the business operator that provides the Didymus Lab service.
  4. "Report" means the PDF research material the Company provides for a Bible passage requested by a member, including original-language analysis, academic materials, fine-art and sacred-art images, related maps, and similar content.
  5. "Request" means a member's submission of a Bible passage and sermon-related information for the production of a report.
  6. "Guest" means a member who has completed registration but has not subscribed to a recurring plan; upon registration, the member receives one free trial (a Premium-grade research report).
  7. "Recurring Subscription Plan" means a monthly-billed tier of Service usage, such as Light, Standard, Premium, Platinum, and Prestige; the depth and scope of materials included in the research report vary according to the member's tier.
  8. "Per-Item Purchase" means a method of use whereby a guest member purchases a report on a single-item basis without a recurring subscription; reports are offered at the Light, Standard, Premium, or Platinum grade depending on the level of materials.

Article 3 (Effect and Amendment of the Terms)

  1. These Terms take effect when they are posted on the Service screen or otherwise notified to members.
  2. The Company may amend these Terms for reasonable cause, and shall give notice at least 7 days before the effective date of any amendment.
  3. A member who does not agree to the amended Terms may discontinue use of the Service and withdraw membership.

Article 4 (Membership Registration)

  1. Membership registration is completed through Kakao account authentication. At registration, the member must enter their name and affiliated church, and may also enter an invitation code.
  2. A member may register for the Service with one Kakao account.
  3. By registering, the member is deemed to have agreed to these Terms and the Privacy Policy.
  4. The member must provide accurate information; providing false information may result in restriction of Service use.
  5. Registration is permitted only once per Kakao account, and an account may not be shared with or transferred to another person.

Article 5 (Service Content)

  1. For a Bible passage requested by a member, the Company provides a report containing the following: original-language (Hebrew and Greek) analysis, a synthesis of academic commentaries and papers, historical, cultural, and archaeological background, and related fine-art and sacred-art images and maps. The composition and depth of the report, however, vary according to the member's plan.
  2. A report is ordinarily provided within 24 hours after the request is received. If delivery is delayed, for example due to a high volume of requests, the member will be notified separately.
  3. Service operating hours run Monday through Friday; Saturday and Sunday fall within the weekend period. For requests made during the weekend period, the member may select one of two options: ① Use of a Weekend Request Pass — the request is processed within 24 hours from the time of submission (for example, a request at 10:00 a.m. on Saturday is delivered before 10:00 a.m. on Sunday). One Weekend Request Pass and one regular subscription request are deducted. ② Next-Week Processing — no Weekend Request Pass is deducted, only one regular subscription request is deducted, and the request enters the weekday queue after 12:00 a.m. on Monday and is processed within 24 hours (usually on Monday).
  4. Reports are provided in PDF form, and members may download them through the portal. The viewing period for past materials varies by plan (Light and Standard: 3 months; Premium: 1 year; Platinum and Prestige: unlimited).
  5. AI (Claude, by Anthropic) is used as a core component in producing reports. A report's content is classified by its method of generation as follows: (a) The expressive portions of academic citations and commentary materials are quoted only from a verified database built directly by the Company, which contains only openly licensed materials (CC-BY, CC0, Public Domain). No non-existent sources or verses are generated. (b) For certain academic papers, the report provides bibliographic information supplied by public academic APIs such as OpenAlex (author, title, journal, year, pages, DOI), together with a single factual statement describing one core claim, finding, or perspective presented in that paper. The Company does not reproduce the text of a paper's abstract, or any condensed expression or argumentative structure thereof, in the body of the report, nor does it store the original abstract in its database. The materials provided under this paragraph are limited to facts and ideas not protected by copyright law (the idea–expression dichotomy). Members who wish to review a paper's specific expression, argumentation, or detailed content are encouraged to access the original text directly through the DOI link shown in the report. (c) Analytical content generated directly by AI—such as the historical and cultural background of the passage, original-language analysis, and sermon drafts (Platinum and above)—may contain errors characteristic of AI. The Company's review focuses on items (b) and (c) and is conducted on a best-effort basis. Members are encouraged to verify core content directly against the original sources.
  6. The content of report requests (additional request notes) on Premium plans and above is stored in encrypted form.
  7. In the course of producing a report, objective academic analysis data about a Bible passage (original-language vocabulary, grammatical parsing, syntactic structure, translation comparisons, and similar data) is cached on the server in a form that cannot identify any individual member, and may be reused when processing another member's request for the same passage. This cache (a) does not include any member's request content, sermon context, personal information, or additional request notes; (b) is limited to public academic data about the Bible passage itself; and (c) applies content differences by member tier separately. The cache is intended to improve the Service's response speed and operational efficiency, and does not affect the quality of any report.

Article 6 (Fees and Payment)

  1. Upon registering for the Service, a member is assigned to the Guest tier by default, and receives one free trial of a Premium-grade research report at registration. A member who registers with an invitation code receives one additional free trial, for a total of two.
  2. Without a recurring subscription, a guest member may purchase reports on a per-item basis by selecting the desired level of materials, as follows (the depth and scope of the research report vary according to the selected level):
    • • Light grade: KRW 10,000 per item.
    • • Standard grade: KRW 20,000 per item.
    • • Premium grade: KRW 30,000 per item.
    • • Platinum grade: KRW 50,000 per item.
  3. For a per-item purchase, once a member selects the level of materials on the request form and submits a purchase inquiry, the Company provides bank account information by email. After payment is confirmed, the corresponding usage credit is granted to the member's account, and the member may submit one request using that credit. The credit has no expiration date and is consumed only upon submitting a request.
  4. Recurring subscription plans are offered as follows, and the depth and scope of materials included in the research report (original-language grammatical and syntactic commentary, primary sources, patristic interpretation, history of preaching and reception history, related maps, number of interpretive perspectives, supplementary sources, and the like) vary according to the member's tier:
    • • Light: KRW 19,000/month (4 reports per month). All sermon types available.
    • • Standard: KRW 39,000/month (7 reports per month). All sermon types; 1 Weekend Request Pass per month.
    • • Premium: KRW 79,000/month (10 reports per month). All sermon types; 2 Weekend Request Passes per month.
    • • Platinum: KRW 179,000/month (20 reports per month). All sermon types; 4 Weekend Request Passes per month; priority processing.
    • • Prestige: KRW 399,000/month (30 reports per month). All sermon types; 10 Weekend Request Passes per month; priority processing and dedicated operation.
  5. Recurring subscription members may purchase additional Weekend Request Passes at KRW 30,000 each, and may request reports exceeding the monthly limit at the per-item price corresponding to the member's tier.
  6. The following term discounts apply to recurring subscriptions: 3 months 10%, 6 months 15%, 1 year 20%.
  7. Using a Weekend Request Pass, a member can receive a report within 24 hours from the time of request during the weekend period (Saturday and Sunday). A member may also submit a request during the weekend period without using a Weekend Request Pass; in that case, no Weekend Request Pass is deducted, only one regular subscription request is deducted, and the request enters the weekday queue after 12:00 a.m. on Monday and is processed within 24 hours.
  8. The monthly request limit renews in 30-day cycles from the registration reference date.
  9. Payment is made by bank transfer, and the Company issues a tax invoice or a cash receipt.
  10. The Company shall notify members one month in advance of any change to Service fees. Changed fees apply only to new purchases and renewals made after the notice, and do not affect recurring subscriptions or per-item purchases for which payment has already been completed.

Article 7 (Refunds and Termination of Contract)

  1. Any recurring subscription member may request termination of the Service at any time, and upon termination a refund is made in proportion to the number of unused requests for the current month.
  2. A guest member's per-item purchase may be canceled at any time before payment is confirmed. After payment is confirmed (the credit is granted), a full refund is available only if the credit has not yet been used. Once a request has been submitted using the credit, no refund is made.
  3. Fees for reports already provided are non-refundable.
  4. In the following cases, the Company may immediately terminate the Service without any refund, and its right to claim damages under Article 8 survives such termination:
    • • Reselling a report for commercial purposes without authorization
    • • Removing, altering, or circumventing the technical protection measures of a report
    • • Sharing an account with, or transferring it to, another person
    • • Producing a similar service based on a report, or infringing the Company's trade secrets
    • • Otherwise materially violating these Terms
  5. If the Company discontinues the Service, it will give one month's prior notice and refund the full amount of any unused fees.

Article 8 (Copyright in Reports and Scope of Use)

  1. Copyright in the reports provided by the Company belongs to the Company, and the member is granted a right of use within the following scope:
    • • Use as private reference material, limited to the member's own sermon preparation and ministry activities where the member personally delivers the sermon
    • • Citing or referencing report content within the sermon
    This right of use is granted for the private use of a single member; use for any other purpose (such as preparing on behalf of another minister, fulfilling outsourced production commissions, or producing seminary lecture materials) requires separate consultation.
  2. The following acts are expressly prohibited:
    • • Providing, selling, or sharing the original report, or a substantial portion of it, with another person
    • • Producing or selling a similar service based on a report
    • • Posting a report online without authorization
    • • Removing, altering, or circumventing the technical protection measures included in a report (watermarks, digital fingerprints, metadata, and the like)
    • • Sharing an account with another person, or using a single account among multiple persons
  3. A member who commits any of the prohibited acts in the preceding paragraph shall bear the following responsibilities:
    • • Compensation for the actual damages the Company incurs as a result of the violation
    • • Where actual damages are difficult to assess, an amount equivalent to the monthly fee of the relevant plan per leaked report shall serve as the minimum basis for damages
    • • Where the act constitutes infringement of trade secrets, such as producing or selling a similar service, civil and criminal liability under the Unfair Competition Prevention and Trade Secret Protection Act
  4. Reports carry technical protection measures that can identify the member to whom they were issued (watermarks, digital fingerprints, and the like). The member acknowledges that such measures exist and agrees not to remove, alter, or circumvent them.
  5. The academic content in a report is not a direct reproduction of the original works, but an independent summary, restructuring, and analysis produced using AI. The academic materials the Company references are limited to openly licensed materials (CC-BY, CC0, Public Domain); non-openly-licensed materials (commercial journals, subscription materials, and materials of unverified license) are not used. The attribution obligation for CC-BY materials is satisfied through source attribution within the report. This policy does not rely on fair use, but rests primarily on license compliance.
  6. Bible translations quoted in a report are cited in compliance with the terms of use and fair-use scope of each translation.
  7. The sacred-art and fine-art images in a report are public domain or duly licensed materials, and the copyright and holding information for each individual image is indicated within the report.
  8. User Indemnification: If a member violates these Terms (in particular the prohibited acts in Article 8, paragraph 2) and thereby causes harm to a third party, or if a third party consequently brings a claim, lawsuit, notice, or the like against the Company, the member shall indemnify the Company for all damages it bears (settlement amounts, litigation costs, attorneys' fees, personnel time, and the like).
  9. Copyright Infringement Notice (C&D) Procedure: A rights holder who asserts that their work has been improperly cited or reproduced in a report may notify the Company in accordance with the procedure set forth on the Copyright Policy page. Upon receiving the notice, the Company will block the relevant material from search results within 24 hours and reply with the outcome of its handling within 48 hours.

Article 9 (Feedback)

  1. Members may submit suggestions, inquiries, comments, and the like regarding the Service through the feedback feature in the portal.
  2. Feedback may be viewed only by the member and the Company, and is not disclosed to other members.
  3. The Company may reply to feedback.

Article 10 (Limitation of Liability)

  1. A report is reference material for sermon preparation and does not guarantee academic or theological completeness. The member bears responsibility for the results of any sermons and ministry activities based on a report's content.
  2. The Company does not grant members access to the original databases of the academic materials used to produce a report.
  3. The Company is not liable for any interruption of the Service due to force majeure, such as natural disasters or system failures.
  4. The Company's total liability for damages arising from technical errors and the like occurring during use of the Service is limited to the amount paid for the report at issue. This limit does not apply, however, to the member's liability for damages arising from a violation of Article 8 (Copyright and Scope of Use).

Article 11 (Dispute Resolution)

  1. Disputes relating to use of the Service shall, as a rule, be resolved through mutual consultation between the Company and the member.
  2. If the parties fail to reach a resolution through consultation, the competent court shall be the court determined in accordance with the Civil Procedure Act.
  3. These Terms shall be construed in accordance with the laws of the Republic of Korea.

Contact: didymus@didymuslab.com