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Legal

Terms of Service

Last updated: 2026-06-15

Note: This is a thorough draft; have legal counsel review before public launch.

These Terms of Service (“Terms”) form a binding agreement between you and ILUCARA LLC (“Ilucara,” “we,” “us,” or “our”) governing your access to and use of Asta Calendar (the “Service”). Please read them carefully.

1. Acceptance of Terms

By creating an account, accessing, or using the Service, you agree to be bound by these Terms and by our Privacy Policy, which is incorporated by reference. If you do not agree, do not use the Service. If you use the Service on behalf of an organization, you represent that you are authorized to bind that organization to these Terms.

2. Description of the Service

Asta Calendar is a cross-platform calendar application available on the web, macOS, iOS, and Android. The Service connects your Google, Microsoft, and Apple iCloud calendars to provide a unified view and to automatically create cross-account “shadow blocks” so your calendars stay mutually aware of your commitments.

Beta and “As-Is” Nature

The Service is currently offered as a free beta. Beta features may be incomplete, may change or be discontinued at any time, and may contain errors or interruptions. The Service is provided on an “as-is” and “as-available” basis. We may modify, suspend, or discontinue any part of the Service at any time, with or without notice.

3. Eligibility and Accounts

You must be at least 16 years old (or 13 where permitted by applicable local law, and not younger) and able to form a binding contract to use the Service. You agree to provide accurate account information and to keep it current. You are responsible for safeguarding your account credentials and for all activity that occurs under your account. Notify us promptly at support@astacalendar.com of any unauthorized use or security breach.

4. Acceptable Use

You agree not to:

  • Use the Service in violation of any applicable law or regulation, or in violation of the terms of any connected third-party service;
  • Access, tamper with, or use non-public areas of the Service, our systems, or our sub-processors’ systems;
  • Interfere with or disrupt the integrity or performance of the Service, including by introducing malware or overloading our infrastructure;
  • Attempt to probe, scan, reverse engineer, decompile, or circumvent any security or rate-limiting feature of the Service, except to the extent such restriction is prohibited by law;
  • Use the Service to access, store, or process data you are not authorized to access;
  • Resell, sublicense, or commercially exploit the Service without our written permission;
  • Use automated means to access the Service in a manner that sends more requests than a human could reasonably produce.

We may suspend or terminate access for conduct we reasonably believe violates these Terms or harms the Service or other users.

5. Third-Party Services and Authorizations

The Service integrates with third-party calendar providers, including Google, Microsoft, and Apple. Your use of those providers is governed by their respective terms and privacy policies, and you are responsible for complying with them. You represent that you have the right to connect each account you authorize and to grant Asta the access it requests.

Asta Calendar is an independent product. It is not affiliated with, endorsed by, or sponsored by Google, Microsoft, or Apple. All trademarks are the property of their respective owners. We are not responsible for the availability, accuracy, or actions of third-party services, and a provider may change or withdraw API access in ways that affect the Service.

6. The Derived “Shadow Block” Model

A core feature of the Service is the creation of derived “shadow block” events. When you authorize Asta to connect your calendars, you instruct and authorize Asta to write, update, and delete shadow block events on your connected calendars. These shadow blocks are placeholder busy events that reflect commitments existing on your other connected calendars, so that all of your calendars remain mutually up to date.

You acknowledge and agree that:

  • Shadow blocks are created and removed automatically based on your connected calendar data and your settings;
  • Synchronization may not be instantaneous, and calendar providers may impose limits, delays, or errors that affect how and when shadow blocks appear or are removed;
  • You are responsible for reviewing your calendars and for any scheduling decisions you make in reliance on the Service;
  • Disconnecting a provider or deleting your account will cause Asta to stop maintaining, and to attempt to remove, the shadow blocks it created, where technically feasible.

You can disable or adjust shadow blocking through the Service’s settings.

7. Beta Disclaimers

Because the Service is in beta, you understand that it may experience downtime, data inconsistencies, missing or duplicated shadow blocks, and other issues. You should not rely on the Service as your sole system of record for critical scheduling. We strongly recommend you maintain access to your underlying calendars directly. We are not liable for any loss arising from beta limitations to the maximum extent permitted by law.

8. Subscriptions, Billing, and Merchant of Record (Future)

The Service is currently free. We may introduce paid plans in the future. When we do:

  • Polar will act as our Merchant of Record. This means Polar will handle checkout, billing, and the calculation, collection, and remittance of applicable sales taxes. Your purchase will also be subject to Polar’s terms applicable to the transaction.
  • Paid plans may be billed on a recurring (for example, monthly or annual) basis and will renew automatically unless cancelled, with pricing and billing terms disclosed at the point of purchase.
  • You authorize Polar to charge your selected payment method for the applicable fees and taxes until you cancel.

We will provide notice before any paid features are introduced, and continued use of paid features will be subject to the billing terms presented at that time.

9. Cancellation and Refunds

You may cancel a paid subscription at any time, effective at the end of the then-current billing period; cancellation stops future renewals but does not retroactively refund the current period unless required by law. Refunds, where offered, will be handled in accordance with the refund policy presented at purchase and through Polar as Merchant of Record. While the Service is free, no fees apply and no refunds are due.

10. Intellectual Property

The Service, including its software, design, and content (excluding your data and your connected calendar data), is owned by Ilucara and its licensors and is protected by intellectual-property laws. Subject to these Terms, we grant you a limited, non-exclusive, non-transferable, revocable license to use the Service for your personal or internal business purposes. You retain all rights to your own data and calendar content. You grant us the limited rights necessary to host, process, and display your data solely to provide the Service as described in our Privacy Policy.

11. Disclaimer of Warranties

TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SERVICE IS PROVIDED “AS IS” AND “AS AVAILABLE,” WITHOUT WARRANTIES OF ANY KIND, WHETHER EXPRESS, IMPLIED, OR STATUTORY, INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND NON-INFRINGEMENT. WE DO NOT WARRANT THAT THE SERVICE WILL BE UNINTERRUPTED, ERROR-FREE, SECURE, OR THAT SHADOW BLOCKS OR CALENDAR SYNCHRONIZATION WILL BE TIMELY, ACCURATE, OR COMPLETE. YOU USE THE SERVICE AT YOUR OWN RISK.

12. Limitation of Liability

TO THE MAXIMUM EXTENT PERMITTED BY LAW, IN NO EVENT WILL ILUCARA OR ITS OFFICERS, EMPLOYEES, OR SUPPLIERS BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, EXEMPLARY, OR PUNITIVE DAMAGES, OR FOR ANY LOSS OF PROFITS, DATA, GOODWILL, OR BUSINESS, ARISING OUT OF OR RELATING TO YOUR USE OF (OR INABILITY TO USE) THE SERVICE, INCLUDING ANY MISSED MEETINGS, SCHEDULING CONFLICTS, OR ERRORS IN SHADOW BLOCKS, WHETHER BASED IN CONTRACT, TORT, OR ANY OTHER THEORY, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

TO THE MAXIMUM EXTENT PERMITTED BY LAW, OUR TOTAL AGGREGATE LIABILITY ARISING OUT OF OR RELATING TO THE SERVICE WILL NOT EXCEED THE GREATER OF (A) THE AMOUNTS YOU PAID US FOR THE SERVICE IN THE TWELVE MONTHS BEFORE THE EVENT GIVING RISE TO THE CLAIM, OR (B) USD $100. Some jurisdictions do not allow certain limitations, so some of the above may not apply to you.

13. Indemnification

You agree to indemnify, defend, and hold harmless Ilucara and its officers, employees, and agents from and against any claims, liabilities, damages, losses, and expenses (including reasonable legal fees) arising out of or related to: (a) your use of the Service; (b) your violation of these Terms; (c) your violation of any third-party right, including the terms of any connected calendar provider; or (d) your data or content.

14. Termination

You may stop using the Service and delete your account at any time. We may suspend or terminate your access, with or without notice, if you violate these Terms, if required by law, or if we discontinue the Service. Upon termination, your right to use the Service ceases, and we will handle your data as described in our Privacy Policy (including purging account data and revoking provider tokens upon account deletion). Sections that by their nature should survive termination (including intellectual property, disclaimers, limitation of liability, indemnification, and governing law) will survive.

15. Governing Law

These Terms are governed by the laws of the State of Texas, United States, without regard to its conflict-of-laws principles, except where mandatory local consumer-protection laws provide otherwise.

16. Dispute Resolution

We encourage you to contact us first at support@astacalendar.com to resolve any dispute informally. If we cannot resolve a dispute informally, you and Ilucara agree that the courts located in the governing jurisdiction identified above will have exclusive jurisdiction, except where applicable law gives you the right to bring a claim in your local courts. Nothing in this section limits any non-waivable statutory rights you may have. Any binding arbitration or class-action waiver terms, if adopted, will be presented separately and prominently before they take effect.

17. Changes to These Terms

We may update these Terms from time to time. When we make material changes, we will update the “Last updated” date above and, where appropriate, provide additional notice. Your continued use of the Service after an update means you accept the revised Terms. If you do not agree to the changes, you must stop using the Service.

18. Miscellaneous

These Terms, together with the Privacy Policy, are the entire agreement between you and Ilucara regarding the Service. If any provision is found unenforceable, the remaining provisions will remain in effect. 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, acquisition, or sale of assets.

19. Contact Us

Questions about these Terms? Contact us at: