These Terms of Service (“Terms”) govern your use of Stacktube (“Service”), operated by unstackd.io (“Operator,” “we,” “us”). They set out the conditions and procedures for using the YouTube video analysis and knowledge management service, and the rights, obligations, and responsibilities between you and us.
“Service” means the automated YouTube video analysis, knowledge note generation, and delivery features provided by Stacktube. “User,” “you,” or “your” means any person or entity that uses the Service, whether registered or not. “Consumer” has the meaning given in applicable consumer protection law (including the UK Consumer Contracts Regulations 2013 and the EU Consumer Rights Directive 2011/83/EU).
These Terms take effect when we post them on the Service or otherwise notify you. We may modify these Terms so long as the changes do not conflict with applicable law. We will provide notice of any material change at least 7 days before the effective date; for changes that are unfavorable to you, we will provide at least 30 days’ notice where required by law. Continued use of the Service after the effective date constitutes acceptance of the revised Terms.
The Service provides: automated YouTube channel monitoring (Pro plan and above), AI-based video analysis and summarization, structured knowledge note generation, automated delivery to Obsidian, email, E-ink tablets (reMarkable, Boox, Kindle, etc.), Google Drive, and Dropbox, and content-type-specific analysis (framework, tutorial, analysis, explanation, news). The Starter plan provides manual analysis only; automatic monitoring is available on paid plans (Pro, Max, Unlimited).
A contract to use the Service is formed when you complete the registration process and accept these Terms. The Service supports sign-up via Google, GitHub, or email and password. You must be at least 13 years of age (or the age of digital consent in your jurisdiction) to register. You are responsible for the accuracy of the information you provide and for all activity that occurs under your account.
If you are a consumer resident in the United Kingdom or the European Economic Area, you have the right to cancel your purchase of a paid plan within 14 days of the contract date, without giving a reason, under the UK Consumer Contracts (Information, Cancellation and Additional Charges) Regulations 2013 and the EU Consumer Rights Directive 2011/83/EU. To exercise this right, send a clear statement to drowsynaru@gmail.com before the 14-day period expires.
By subscribing to a paid plan and starting to use the Service (for example, by running any analysis) within the 14-day period, you expressly request that we begin providing the Service before the cooling-off period ends, and acknowledge that you will lose the right to withdraw once the Service has been fully performed. If you cancel before full performance, we will charge for the portion of the Service supplied up to the cancellation, on a pro-rated basis.
The Service offers Starter (free), Pro, Max, and Unlimited plans. Fees and payments for paid plans are processed by Paddle.com Market Ltd. and its affiliates, which act as Merchant of Record. All prices are displayed in U.S. dollars (USD); the amount charged in your local currency depends on the exchange rate at the time of payment. Applicable sales tax, VAT, GST, or similar taxes are calculated and collected by Paddle. We will give at least 30 days’ notice before any fee change.
If you have not used the Service within 7 days of purchasing a paid plan, you may request a full refund. “Use” means running at least one analysis; logging in alone does not count as use. If you have used the Service, we will refund you on a pro-rated basis using the following formula:
Refund amount = Monthly fee − (Monthly fee ÷ 30 × days used)
For annual plans, if you request a refund within 14 days of purchase, we will calculate the pro-rated refund on the same daily basis against the annual fee. Refund requests should be sent to drowsynaru@gmail.com. Refunds are processed to your original payment method within 10 business days of the request. This refund policy operates in addition to any statutory rights you have as a consumer.
You may cancel a paid plan at any time from the Service settings or by email to drowsynaru@gmail.com. Cancellation takes effect at the end of the current billing period; fees already paid for that period are not refunded (except where you exercise the cooling-off right in § 5.1 or the refund policy in § 6.1). After cancellation, your account reverts to the free Starter plan.
To permanently delete your account, email us at drowsynaru@gmail.com. We will delete all personal data and analysis records tied to your account within 30 days of the deletion request, except where retention is required by law.
You must comply with applicable law, these Terms, and any guidance we publish in connection with the Service. You must not impersonate others, use the Service fraudulently, interfere with its operation, attempt to bypass rate limits or access controls, or use automated means to extract data beyond what the Service exposes via its intended interfaces. You must not use the Service to analyze content that you do not have the right to access.
We may restrict or suspend all or part of the Service for system maintenance, equipment replacement, network outages, or other unavoidable reasons. We will give advance notice where reasonably possible; where force majeure prevents advance notice, we will give notice as soon as practicable afterward.
The copyright in YouTube videos belongs to the respective content creators; Stacktube provides analysis tooling only, and you are responsible for ensuring that your use of any analyzed content complies with the source’s terms of use and applicable copyright law. The Service relies on third-party AI models; we do not warrant the accuracy, completeness, or fitness for a particular purpose of any analysis result, and you are responsible for how you use the output. To the maximum extent permitted by law, the Service is provided “as is” and “as available,” and we disclaim all implied warranties. Nothing in these Terms limits liability for fraud, death or personal injury caused by negligence, or any other liability that cannot be excluded by law.
These Terms are governed by the laws of the Republic of Korea, without regard to its conflict-of-laws principles. If you are a consumer, this choice of law does not deprive you of the protection afforded by mandatory provisions of the law of your country of residence. Any dispute arising out of or in connection with these Terms will be submitted to the competent court having jurisdiction; consumers may also bring proceedings before the courts of their country of residence where applicable law permits.
Effective date: April 22, 2026