Terms of Service

Last updated: April 7, 2026

These Terms of Service (the "Terms") govern your access to and use of Evolve and any related websites, applications, products, and services provided by PDF AI Lab (collectively, the "Services").

Evolve is an audio-first book summary product. The Services allow users to access, listen to, organize, and interact with spoken summaries and related content. In current or upcoming versions, the Services may also allow users to create accounts, purchase subscriptions, receive notifications, and upload documents or other materials in order to generate new summaries, audio content, transcripts, or related outputs.

By downloading, installing, accessing, or using the Services, you agree to be bound by these Terms. If you do not agree, you must not use the Services.

1. Eligibility and Accounts

You must comply with applicable law when using the Services. If we make account registration available, you are responsible for maintaining the confidentiality of your account credentials and for all activities that occur under your account.

You agree to provide accurate information and to keep your account information up to date.

2. License and Permitted Use

Subject to your compliance with these Terms, we grant you a limited, non-exclusive, non-transferable, revocable license to access and use the Services for your personal, non-commercial use, unless we expressly authorize otherwise in writing.

You may use the Services to browse, play, and manage content made available through the product and, where supported in your version of the Services, to upload your own documents or other materials for processing.

3. Restrictions on Use

You agree not to:

  • copy, reproduce, distribute, publicly display, publicly perform, republish, or exploit the Services except as permitted by these Terms or applicable law;
  • modify, reverse engineer, decompile, disassemble, or attempt to derive source code from the Services, except to the extent such restriction is prohibited by law;
  • use the Services to build a competing product or service;
  • use bots, scrapers, crawlers, or other automated means to access the Services in a manner that burdens or disrupts our systems;
  • interfere with the integrity, security, or proper operation of the Services;
  • bypass or attempt to bypass usage limits, access controls, or subscription restrictions;
  • use the Services for illegal, infringing, abusive, defamatory, harassing, deceptive, or harmful purposes;
  • upload malware, malicious code, or content designed to disrupt systems or compromise security;
  • submit content you do not have the right to use, upload, process, or share;
  • use the Services to reproduce, distribute, or generate outputs intended to substitute for protected books or other copyrighted works in a manner that infringes the rights of others.

4. User Content and Uploads

You may be able to upload documents, text, files, prompts, instructions, notes, feedback, or other content ("User Content").

You retain ownership of your User Content, but you grant us a worldwide, non-exclusive, royalty-free license to host, store, reproduce, modify, adapt, process, transmit, and otherwise use your User Content as necessary to:

  • operate, provide, and improve the Services;
  • generate summaries, transcripts, audio, and related outputs you request;
  • maintain safety, security, and abuse prevention systems;
  • comply with law and enforce these Terms.

You represent and warrant that:

  • you own or have all rights necessary to provide the User Content and grant the license above;
  • your User Content and our use of it as permitted by these Terms will not violate any law or any third-party rights;
  • your User Content does not contain malicious code or material intended to damage systems or data.

You also agree not to upload or submit books, manuscripts, articles, PDFs, or other materials protected by copyright unless you have the rights or authorization necessary for your intended use of the Services.

We may remove, refuse, or restrict User Content if we believe it violates these Terms, applicable law, or the rights or safety of others.

5. Generated Output

The Services may generate summaries, transcripts, audio, recommendations, metadata, or other outputs based on your inputs and our content pipeline ("Output").

You are responsible for reviewing Output before relying on it. Output may be incomplete, inaccurate, biased, unavailable, or unsuitable for your intended use. The Services are provided for informational and entertainment purposes and are not a substitute for professional advice.

We may use automated systems, machine learning, text processing, or speech generation technologies to provide the Services.

6. Subscriptions, Billing, and Payments

Certain features of the Services may require a paid subscription or one-time purchase. If you purchase a subscription or paid feature:

  • you authorize the applicable app store, payment processor, or us to charge the fees, taxes, and recurring amounts disclosed at the time of purchase;
  • subscriptions may renew automatically unless canceled in accordance with the applicable billing terms;
  • pricing, available plans, trial terms, and billing cycles may change as permitted by law and platform rules;
  • refunds, if any, are subject to the rules of the app store or payment provider through which you purchased, unless otherwise stated by us.

You are responsible for any charges, taxes, and fees associated with your purchases.

7. Privacy

Your use of the Services is also governed by our Privacy Policy, which describes how we collect, use, and disclose information.

8. Intellectual Property

The Services, including all software, audio, visual elements, text, design, trademarks, logos, and other materials made available by us, are owned by or licensed to PDF AI Lab and are protected by intellectual property and other laws.

Except for the limited rights expressly granted in these Terms, no rights are granted to you.

9. Copyright Complaints and Repeat Infringers

We respect the intellectual property rights of others and expect users of the Services to do the same.

If you believe that any content made available through the Services infringes your copyright or other intellectual property rights, you may send us a notice at [email protected] with sufficient detail for us to review the claim, including:

  • identification of the work or material claimed to be infringed;
  • identification of the allegedly infringing content and its location in the Services;
  • your contact information;
  • a statement that you have a good-faith belief that the disputed use is not authorized by the rights owner, its agent, or the law; and
  • a statement that the information in your notice is accurate and that you are authorized to act on behalf of the rights owner, if applicable.

We may remove, disable access to, or limit the availability of content that we believe may infringe the rights of others, and we may suspend or terminate accounts of repeat infringers where appropriate.

10. Third-Party Services

The Services may integrate with or rely on third-party services, including payment services, analytics tools, attribution tools, advertising partners, hosting providers, and content or technology providers. We are not responsible for third-party services, and your use of them may be subject to separate terms and policies.

11. Termination

You may stop using the Services at any time. We may suspend or terminate your access to the Services, with or without notice, if we believe:

  • you violated these Terms;
  • your use creates risk for us, other users, or third parties;
  • suspension or termination is required by law or by a platform provider;
  • it is necessary to protect the security, integrity, or operation of the Services.

Sections that by their nature should survive termination will survive, including provisions on ownership, licenses, disclaimers, limitations of liability, indemnity, and dispute resolution.

12. Disclaimer of Warranties

To the fullest extent permitted by law, the Services are provided "as is" and "as available" without warranties of any kind, whether express, implied, statutory, or otherwise.

We do not guarantee that the Services will be uninterrupted, error-free, secure, accurate, or available at any particular time or place, or that any content or Output will meet your expectations or requirements.

13. Limitation of Liability

To the fullest extent permitted by law, PDF AI Lab and its affiliates, officers, employees, agents, partners, and licensors will not be liable for any indirect, incidental, special, consequential, exemplary, or punitive damages, or for any loss of profits, revenues, goodwill, data, content, or business opportunities arising out of or related to your use of or inability to use the Services.

To the fullest extent permitted by law, our total liability for all claims arising out of or relating to the Services or these Terms will not exceed the greater of:

  • the amount you paid us for the Services in the 12 months before the event giving rise to the claim; or
  • US$50.

Some jurisdictions do not allow certain limitations, so some of the above may not apply to you.

14. Indemnification

You agree to defend, indemnify, and hold harmless PDF AI Lab and its affiliates, officers, employees, agents, partners, and licensors from and against any claims, liabilities, damages, losses, judgments, awards, costs, and expenses, including reasonable attorneys' fees, arising out of or related to:

  • your use of the Services;
  • your User Content;
  • your violation of these Terms;
  • your violation of any law or the rights of a third party.

15. Changes to the Services or Terms

We may modify, suspend, or discontinue all or part of the Services at any time. We may also update these Terms from time to time. The updated Terms will be made available within the Services or otherwise provided to you. Your continued use of the Services after the updated Terms become effective constitutes your acceptance of the updated Terms.

16. Governing Law and Dispute Resolution

These Terms and any dispute arising out of or relating to these Terms or the Services are governed by the laws of the United States, without regard to conflict of law principles.

Before filing a formal claim, you and we agree to attempt to resolve the dispute informally by contacting the other party first.

If a dispute cannot be resolved informally, the dispute shall be resolved by binding arbitration in Delaware, U.S.A., except to the extent prohibited by applicable law. Either party may seek injunctive or equitable relief in a court of competent jurisdiction where necessary to protect intellectual property or confidential information.

17. Miscellaneous

If any provision of these Terms is held invalid or unenforceable, the remaining provisions will remain in full force and effect.

Our failure to enforce any provision of these Terms is not a waiver of that provision or any other right.

You may not assign or transfer these Terms without our prior written consent. We may assign these Terms in connection with a merger, acquisition, corporate reorganization, or sale of assets.

18. Contact

If you have questions or feedback regarding the Services or these Terms, please contact us at:

[email protected]