NimbleCal

Terms of Service

TL;DR: NimbleCal provides an end-to-end encrypted calendar service with free and paid plans. You are responsible for your account and for complying with these terms and applicable laws. We process payments and subscriptions via Polar and related providers. We do not sell your data or use your calendar content for advertising, but we may change or discontinue features as the service evolves.

Last updated: January, 2026

1. Agreement to terms

By accessing or using NimbleCal's website, web application, or related services (collectively, the "Service"), you are entering into a contract with Nimbledot, LLC ("NimbleCal", "we", "us") and you agree to be bound by these Terms of Service ("Terms"). If you do not agree, do not use the Service.

If you are using the Service on behalf of an organization, you represent and warrant that you have authority to bind that organization to these Terms, and "you" also refers to that organization.

2. Description of the service

NimbleCal is a privacy-focused calendar application with:

  • End-to-end encrypted storage of calendar content, as described in the Privacy Policy
  • Local-first sync using encrypted documents across your devices
  • Optional subscriptions that unlock higher limits and additional features
  • A marketing site that explains and promotes the product

We may add, modify, or remove features from time to time. Where changes materially affect your use or your rights, we will make reasonable efforts to notify you.

3. Eligibility

To use the Service, you must:

  • Be at least the age of majority in your jurisdiction or have valid consent from a parent or legal guardian
  • Have the legal capacity to enter into a binding agreement with us
  • Not be barred from using the Service under any applicable laws

If you are using the Service on behalf of an organization, you must ensure that your organization complies with these Terms.

4. Accounts, security, and responsibility

To use the NimbleCal app you must create an account, typically by providing an email address and password or by using an identity provider (for example, Google or GitHub, if enabled).

You are responsible for:

  • Maintaining the confidentiality of your login credentials, including any keys, passwords, and recovery codes
  • Restricting access to the devices and browsers where you are signed in
  • All activity that occurs under your account, whether or not you authorized it

You agree to:

  • Provide accurate and up-to-date information when creating and managing your account
  • Notify us promptly if you suspect any unauthorized access to or use of your account
  • Use strong, unique passwords and keep them secure

Because NimbleCal uses end-to-end encryption for calendar content, losing your password, recovery codes, or device keys may result in permanent loss of access to your encrypted data. We cannot recover your calendar content if you lose the necessary keys or credentials.

5. Acceptable use

You agree not to use the Service to:

  • Violate any applicable law or regulation
  • Store, transmit, or share content that is illegal, abusive, harassing, defamatory, or otherwise harmful
  • Infringe or misappropriate the intellectual property or privacy rights of others
  • Attempt to gain unauthorized access to any systems, networks, or accounts
  • Interfere with or disrupt the integrity or performance of the Service
  • Reverse engineer, decompile, or otherwise attempt to extract source code or underlying ideas, except to the extent permitted by law that cannot be waived by contract
  • Use automated systems (such as bots or scrapers) to access the Service in a way that burdens or interferes with normal operation

We reserve the right, but are not obligated, to investigate and take appropriate action (including account suspension or termination) in response to suspected violations of this section.

6. Subscriptions, billing, and refunds

6.1 Subscription plans

NimbleCal may offer free and paid subscription tiers. Paid tiers generally provide higher usage limits and additional features (for example, more calendars or events, or priority support). The details of each plan, including pricing and limits, are described in the app or on the website at the time of purchase.

We may change plan features, limits, or pricing in the future. Changes will not retroactively apply to billing periods that you have already paid for, but they may apply to renewals.

We may offer promotional access or discounts from time to time. Any promotional terms will be described in the app or at checkout when you sign up.

6.2 Payment processing via Polar

Paid subscriptions are processed through Polar and its payment partners. When you start a paid subscription:

  • You authorize Polar and its payment processors to charge the payment method you provide for the applicable subscription price, taxes, and any other charges disclosed at checkout.
  • Polar and its processors handle your payment method details; we do not store your full card number or bank account information on our own servers.
  • We may receive subscription and billing metadata from Polar (for example, subscription ID, product ID, status, and associated email) to determine your access level and manage your subscription.

Your use of Polar and its payment partners may be subject to their own terms and policies.

6.3 Billing and renewal

Subscriptions are typically billed in advance on a recurring basis (for example, monthly or annually), depending on the plan you choose. Unless otherwise stated:

  • Your subscription will automatically renew at the end of each billing period, using the payment method on file, until you cancel.
  • You can cancel your subscription at any time. Cancellation will take effect at the end of the current billing period; you will retain access to paid features until then.

If a payment cannot be processed, we may:

  • Retry the charge
  • Ask you to update your payment method
  • Downgrade your account to a free tier or suspend access to paid features

6.4 Refunds

Refunds are governed by our Refund Policy (linked on the website). In early access, we generally offer a 30-day money-back guarantee on your first payment (no questions asked) as described in that policy.

If you believe a charge is incorrect or unauthorized, contact us promptly so we can investigate.

7. Intellectual property

7.1 Our rights

The Service, including the software, design, text, graphics, logos, and other content we provide (excluding your content), is owned by us or our licensors and is protected by intellectual property laws.

Subject to your compliance with 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 may not:

  • Copy, modify, distribute, sell, or lease any part of the Service
  • Use the Service in a way that infringes our rights or those of others

Any rights not expressly granted to you are reserved by us.

7.2 Your content

You retain ownership of the calendar data and other content you upload or create within the Service ("Your Content").

To operate the Service (including syncing, storing, and backing up encrypted data), you grant us and our infrastructure providers a limited, worldwide, royalty-free license to host, process, and transmit Your Content as necessary to provide the Service to you. Because Your Content is end-to-end encrypted, this license does not grant us the ability to read your calendar content in plaintext.

You are responsible for:

  • Ensuring you have the necessary rights to upload and use Your Content in the Service
  • Backing up Your Content where appropriate (for example via exports), especially given the encryption model and the possibility of key loss

8. Privacy

Our collection, use, and disclosure of personal data in connection with the Service are described in the NimbleCal Privacy Policy. By using the Service, you acknowledge that you have read the Privacy Policy and that it forms part of these Terms.

If there is a conflict between these Terms and the Privacy Policy, these Terms govern the contractual relationship, while the Privacy Policy governs how we handle personal data.

9. Third-party services

The Service relies on third-party providers such as:

  • Supabase for authentication, data storage, and sync
  • Polar for subscription billing and related customer management
  • Email providers (for example Plunk) for transactional email (invitations) and optional opt-in product updates
  • Hosting providers for serving the app and marketing site

Your use of these services may be subject to their own terms and privacy policies. We do not control and are not responsible for the legal compliance or performance of third-party services when they act as independent providers, but we aim to choose providers that align with NimbleCal's privacy and security goals.

10. Service changes, availability, and discontinuation

We aim to keep the Service fast, reliable, and secure, but:

  • The Service is provided on an "as is" and "as available" basis.
  • We may modify, suspend, or discontinue all or part of the Service at any time, with or without notice, for example for maintenance, security, legal, or business reasons.
  • Planned breaking changes that affect ongoing use (for example, major shifts in storage or subscription behavior) will be announced with reasonable lead time when practical.

We are not liable for any loss or damage resulting from downtime, service interruptions, or changes to the Service, except as required by law.

11. Disclaimers

To the maximum extent permitted by applicable law:

  • The Service is provided "as is" and "as available" with no warranties of any kind, whether express, implied, or statutory.
  • We specifically disclaim any implied warranties of merchantability, fitness for a particular purpose, and non-infringement.
  • We do not warrant that the Service will be uninterrupted, error-free, or completely secure, or that it will meet your expectations.

Because of the end-to-end encryption model, certain support actions (for example, recovering lost calendar content without keys) are technically impossible for us. You acknowledge that this is a deliberate design choice to prioritize your privacy.

12. Limitation of liability

To the maximum extent permitted by applicable law:

  • Neither we nor our directors, employees, or service providers are liable for any indirect, incidental, special, consequential, or punitive damages arising out of or in connection with the use of or inability to use the Service (including data loss, loss of profits, or business interruption), even if we have been advised of the possibility of such damages.
  • Our total aggregate liability to you for all claims relating to the Service will not exceed the greater of:
    • The amount you paid to us for the Service in the twelve (12) months preceding the event giving rise to the claim; or
    • One hundred (100) US dollars.

Some jurisdictions do not allow the exclusion or limitation of certain damages, so some of the above limitations may not apply to you. In those cases, our liability will be limited to the fullest extent permitted by applicable law.

13. Indemnification

You agree to indemnify, defend, and hold harmless NimbleCal and our officers, directors, employees, and service providers from and against any claims, liabilities, damages, losses, and expenses (including reasonable legal fees) arising out of or in any way connected with:

  • Your use of the Service
  • Your violation of these Terms
  • Your violation of any law or the rights of any third party

We may, at our own expense, assume the exclusive defense and control of any matter otherwise subject to indemnification by you, in which case you agree to cooperate with our defense.

14. Suspension and termination

We may suspend or terminate your access to the Service, or any portion of it, at any time if:

  • You materially breach these Terms
  • We are required to do so by law or by a valid request from a government or regulatory body
  • Continuing to provide the Service to you would present an unacceptable risk (for example, security risk or fraud)

If we terminate your account without cause (for example, due to discontinuation of the Service), and you have a paid subscription, we will make reasonable efforts to provide a prorated refund for any prepaid, unused subscription period, unless prohibited by law.

You may stop using the Service at any time and may request account deletion as described in the Privacy Policy.

15. Governing law and dispute resolution

These Terms are governed by the laws of the jurisdiction where NimbleCal is organized or primarily operates, without regard to its conflict of law principles. The specific jurisdiction will be identified in an updated version of these Terms as the company structure formalizes.

Any disputes arising out of or relating to these Terms or the Service will be subject to the exclusive jurisdiction of the courts of that jurisdiction, unless applicable law requires otherwise.

Nothing in this section limits your rights under mandatory consumer protection laws that cannot be waived.

16. Changes to these terms

We may update these Terms from time to time, for example to reflect changes in the Service, legal requirements, or business practices.

  • When we make material changes, we will post the updated Terms and update the "Last updated" date at the top.
  • We may also notify you through the app or by email where appropriate.
  • Your continued use of the Service after changes take effect constitutes acceptance of the updated Terms.

If you do not agree to the updated Terms, you should stop using the Service and, if applicable, cancel your subscription.

17. Contact

If you have questions about these Terms or the Service, you can reach us at:

If you are a resident of a jurisdiction with specific consumer or data protection agencies, you may also have the right to contact those agencies. These Terms do not limit any non-waivable rights you have under local law.