Castellan Terms of Service

Effective July 13, 2026.

These Terms of Service (the “Terms”) govern your use of Castellan, including the Castellan iOS application, websites, and related services (collectively, “Castellan”). Castellan is operated by Sweat Tech Ventures LLC (“Sweat Tech Ventures,” “we,” “us,” or “our”). By accessing or using Castellan, you agree to these Terms and our Privacy Policy. If you do not agree, do not use Castellan.

Eligibility and accounts

You must be at least 18 years old and legally able to enter into a binding agreement to use Castellan. You are responsible for providing accurate information, maintaining the security of your account and devices, and all activity under your account. Notify us promptly if you believe your account has been accessed without authorization.

What Castellan provides

Castellan provides home maintenance organization, memory, reminders, and general guidance. Features and availability may change, be interrupted, or be discontinued as the service evolves. We may impose reasonable limits or suspend features to protect users, security, reliability, or the service.

AI-generated guidance

Castellan may use artificial intelligence to analyze information or photos you provide and to generate maintenance suggestions. AI-generated content may be incomplete, outdated, inaccurate, or inappropriate for your particular property. Castellan does not inspect your home and does not guarantee that it will identify every hazard, defect, recall, maintenance need, or code requirement.

Not professional advice or emergency service

Castellan is an organizational and informational tool, not a substitute for professional inspection, repair, engineering, legal, insurance, safety, medical, or emergency services. Do not rely on Castellan where an error or delay could cause injury, death, property damage, or other material harm. For suspected gas leaks, fire, carbon monoxide, electrical hazards, active flooding, structural danger, or other emergencies, leave the area when appropriate and contact emergency services or a qualified professional.

Your responsibilities

You are responsible for deciding whether and how to act on Castellan content. Before performing maintenance or repairs, verify guidance against manufacturer instructions, warranties, safety notices, recalls, permits, applicable codes, and advice from qualified professionals. Use appropriate protective equipment and do not perform work that exceeds your training, licensing, or ability.

Acceptable use

You may not use Castellan unlawfully; submit content you do not have the right to use; interfere with or circumvent security, access controls, usage limits, or service operation; probe or exploit vulnerabilities; introduce malicious code; scrape or reverse engineer Castellan except where applicable law expressly permits it; impersonate another person; or use Castellan to harm, defraud, or violate the rights of others.

Your content

You retain ownership of the text, photos, records, and other content you submit. You grant Sweat Tech Ventures a worldwide, non-exclusive, royalty-free license to host, copy, process, transmit, display to you, and otherwise use that content only as reasonably necessary to provide, secure, support, troubleshoot, and improve Castellan, comply with law, and enforce these Terms. You represent that you have the rights needed to provide your content and grant this license.

Our ownership and feedback

Sweat Tech Ventures and its licensors own Castellan, including its software, design, branding, and service-generated materials, except for your content. If you voluntarily provide product ideas or feedback, you permit us to use them without restriction or compensation, but you are not required to provide feedback.

Subscriptions and Apple billing

Castellan may offer auto-renewable subscriptions through Apple’s in-app purchase system. Prices, billing periods, and included features are shown before purchase. Payment is charged to your Apple Account. Your subscription renews automatically unless you cancel through your Apple Account settings at least 24 hours before the end of the current billing period. Apple administers billing, cancellation, renewal, taxes, and refunds under its applicable terms and policies. Deleting Castellan or your Castellan account does not itself cancel an Apple subscription.

Founder pricing

If you subscribe at a price expressly designated as Founder pricing, we will preserve that base subscription price while that subscription remains continuously active and in good standing. Founder pricing may end if you cancel, switch subscription products, allow the subscription to expire beyond any billing-recovery or preserved-price resubscription period Apple provides, receive a refund that ends the subscription, or lose access because you violated these Terms. Taxes and charges controlled by Apple remain subject to Apple’s policies. Founder pricing does not guarantee that every feature will remain unchanged or available forever.

Third-party services and links

Castellan may rely on or link to third-party services, merchants, contractors, manufacturers, or other providers. They are independent from Sweat Tech Ventures, and their products, advice, availability, pricing, and conduct are governed by their own terms. If affiliate links are enabled, we may earn compensation from qualifying purchases.

Suspension and termination

You may stop using Castellan at any time. We may suspend or terminate access when reasonably necessary to address a violation of these Terms, legal or security risk, nonpayment, misuse, or discontinuation of the service. Provisions that by their nature should survive termination—including ownership, disclaimers, liability limits, indemnity, and dispute terms—will survive.

Disclaimer of warranties

To the fullest extent permitted by law, Castellan is provided “as is” and “as available,” without warranties of any kind, express, implied, or statutory, including warranties of merchantability, fitness for a particular purpose, title, non-infringement, accuracy, reliability, availability, or that Castellan will prevent damage or identify every maintenance or safety issue. Some jurisdictions do not allow certain disclaimers, so portions of this section may not apply to you.

Limitation of liability

To the fullest extent permitted by law, Sweat Tech Ventures and its members, officers, employees, contractors, affiliates, and service providers will not be liable for indirect, incidental, special, consequential, exemplary, or punitive damages; loss of data, use, profits, or goodwill; home damage; repair or replacement costs; personal injury; or losses arising from reliance on Castellan guidance. To the fullest extent permitted by law, their total liability for all claims relating to Castellan will not exceed the greater of $100 or the amount you paid for Castellan during the 12 months before the event giving rise to the claim. These limits do not exclude liability that cannot legally be limited.

Indemnity

To the extent permitted by law, you will defend, indemnify, and hold harmless Sweat Tech Ventures and its members, officers, employees, contractors, and affiliates from third-party claims, damages, and reasonable costs arising from your unlawful content, your material misuse of Castellan, or your material violation of these Terms or another person’s rights. This obligation does not apply to the extent a claim was caused by Sweat Tech Ventures.

Informal dispute resolution

Before starting arbitration or litigation, the complaining party must send a written notice describing the dispute and requested resolution. Notices to us must be sent to founders@sweat.tech. The parties will attempt in good faith to resolve the dispute for 30 days after receipt of notice. Either party may bring an individual claim in small-claims court without completing this process where permitted.

Individual arbitration and class-action waiver

Except for individual small-claims matters and requests for injunctive relief concerning intellectual property, security, unauthorized access, or misuse of Castellan, any dispute arising from or relating to these Terms or Castellan will be resolved by binding individual arbitration administered by the American Arbitration Association under its applicable Consumer Arbitration Rules. The Federal Arbitration Act governs this section. Arbitration may occur remotely unless the arbitrator requires otherwise. You and Sweat Tech Ventures waive trial by jury and agree that claims may be brought only in an individual capacity, not as a plaintiff, class member, or representative in a class, consolidated, mass, or representative proceeding. If a court finds a particular claim or remedy cannot lawfully be arbitrated, only that claim or remedy may proceed in court after all arbitrable matters are completed.

Arbitration opt-out

You may opt out of the arbitration and class-action-waiver section by emailing founders@sweat.tech within 30 days after you first accept these Terms. Your notice must include your name, the email associated with your account, and a clear statement that you opt out of arbitration. Opting out will not affect any other part of these Terms.

Wyoming law and courts

These Terms are governed by Wyoming law, without regard to conflict-of-law rules, except that the Federal Arbitration Act governs arbitration. For disputes that are not subject to arbitration, you and Sweat Tech Ventures consent to the exclusive jurisdiction of the state and federal courts located in Wyoming and waive any objection to venue there. Mandatory consumer rights in your place of residence remain unaffected where they cannot lawfully be waived.

Apple terms

For the iOS application, these Terms supplement rather than replace Apple’s applicable Standard Licensed Application End User License Agreement and App Store terms. Apple is not responsible for providing Castellan support. If these Terms conflict with mandatory Apple terms, the mandatory Apple terms control for your use of the iOS application.

Changes to these Terms

We may update these Terms to reflect changes to Castellan, law, security, or business practices. We will post the revised Terms and update the effective date and, when required, provide additional notice. Material changes will apply prospectively. Continued use after revised Terms take effect constitutes acceptance, except where law requires affirmative consent. An update to these Terms alone will not end preserved Founder pricing.

General terms

These Terms and the Privacy Policy are the entire agreement between you and Sweat Tech Ventures regarding Castellan, subject to applicable Apple terms. If any provision is unenforceable, it will be enforced to the maximum extent permitted and the remaining provisions will remain effective. Our failure to enforce a provision is not a waiver. You may not assign these Terms without our consent; we may assign them in connection with a merger, financing, reorganization, sale of assets, or by operation of law.

Contact

Email founders@sweat.tech.