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Last updated: June 22, 2026

Privacy Policy

This Privacy Policy describes how EverChapter ("EverChapter," "we," "us," or "our") collects, uses, stores, shares, transfers, retains, processes, and protects information when you use the EverChapter mobile application, related websites, services, features, and any associated integrations or APIs (collectively, the "Service"). By creating an account, signing in, installing, accessing, or using the Service in any way, you acknowledge that you have read, understood, and agreed to this Privacy Policy and to our Terms of Service.

If you do not agree with this Privacy Policy, you must not access or use the Service.

1. Scope and acceptance

This Privacy Policy applies to all information collected through the Service, regardless of whether the information is provided by you, generated by your activity, derived from your use, observed by the Service, inferred by our systems, or received from third parties. By using the Service, you grant EverChapter the broadest possible permission allowed under applicable law to collect, store, use, share, process, transfer, monetize, license, sublicense, and retain your information for any purpose described in this Privacy Policy or any other lawful purpose. This includes purposes that may be added later through updates to this Policy.

2. Information we collect

We collect a wide range of information in order to operate, secure, improve, personalize, monetize, and evolve the Service. Categories include, but are not limited to:

(a) Account and identity information: name, display name, email address, profile photo, authentication identifiers (including Apple Sign-In, Google Sign-In, and similar providers), unique user IDs, friend codes, and any information you provide during sign-up or in your profile.

(b) Reading and activity information: book titles, authors, ISBNs, reading progress, time spent reading, chapters read, notes, quotes, reflections, ratings, reviews, completed books, current goals, streaks, quests completed, achievements unlocked, virtual currency balances, items owned or applied, room decoration choices, and all interactions with content inside the Service.

(c) Social and friend information: friend connections, friend requests, social activity, shared progress, leaderboard data, friend-related notifications, messages, comments, reactions, and any information generated by social features.

(d) Device and technical information: device model, operating system and version, app version, language and region settings, time zone, IP address, advertising identifiers (including IDFA where permitted), device identifiers, screen size, hardware capabilities, network information, carrier information, crash logs, performance data, and diagnostic information.

(e) Usage and analytics information: feature usage, screen views, taps, sessions, session duration, navigation paths, button presses, errors, retention metrics, A/B test cohorts, feature flags, in-app events, app open frequency, and any behavioral telemetry generated by your use of the Service.

(f) Purchase and subscription information: purchase history, subscription status, in-app purchase events, receipts, transaction identifiers, premium entitlements, promotional code redemptions, refund events, and related billing metadata. Payment card numbers are processed by the relevant payment provider (such as Apple) and are not stored by us.

(g) Notification and communication information: push notification tokens, permission states, notification interactions, email open and click events, and your communication preferences.

(h) Content you submit: book information, notes, quotes, reflections, profile content, photos or images you upload, support requests, survey responses, feedback, and any other content you create or share through the Service.

(i) Inferred and derived information: reading habits, content preferences, engagement signals, predicted interests, likelihood-to-purchase scores, recommended content lists, churn risk scores, and any insights generated through our own or third-party processing systems, including statistical and machine-learning models.

(j) Information from third parties: information provided to us by sign-in providers (such as Apple or Google), analytics partners, attribution providers, advertising partners, fraud-prevention services, payment providers, customer support tools, and any other services we integrate with.

We may combine information collected from any of the categories above with information collected from other sources, and we may continue to collect, generate, derive, and infer additional information as the Service evolves.

3. How we use information

We use information for any purpose permitted by law, including but not limited to:

  • Providing, operating, and maintaining the Service;
  • Creating, securing, and managing accounts;
  • Personalizing content, recommendations, quests, rewards, and the in-app experience;
  • Operating premium features, virtual items, and purchases;
  • Operating social features, friend connections, and community elements;
  • Sending notifications, reminders, marketing messages, and service communications;
  • Analyzing usage, performance, retention, and engagement;
  • Conducting research, experiments, A/B tests, and product development;
  • Training, evaluating, and improving machine-learning models, recommendation systems, and other algorithmic systems used by EverChapter, our affiliates, our service providers, and our partners, including by using your content and activity as training inputs;
  • Detecting, preventing, and addressing fraud, abuse, security issues, and policy violations;
  • Enforcing our Terms of Service and any other applicable policies;
  • Complying with legal obligations, lawful requests, and regulatory requirements;
  • Conducting marketing, promotion, advertising, attribution, retargeting, and audience-building activities;
  • Generating aggregated, anonymized, pseudonymized, derived, or statistical data sets for any purpose, including commercial use, licensing, and sharing with third parties without restriction;
  • Developing new features, products, services, business lines, partnerships, and commercial opportunities;
  • Any other purpose disclosed to you at the time of collection or otherwise permitted by law.

You acknowledge that, to the fullest extent permitted by applicable law, EverChapter may use your information broadly and at our discretion for the purposes above and for additional lawful purposes we may identify in the future, including purposes that may emerge as the Service, our business, or applicable technologies change.

4. Legal bases for processing (where applicable)

Where required by law (such as under the GDPR or UK GDPR), we rely on one or more of the following legal bases to process personal information: performance of a contract; our legitimate interests in operating, securing, improving, and monetizing the Service; your consent (which you may withdraw where required by law); compliance with legal obligations; and protection of vital interests. Where consent is required, your use of the Service, your acceptance of this Policy, and your continued interaction with the Service constitute your consent to the maximum extent permitted by applicable law.

5. Sharing and disclosure

We may share, transfer, sell, license, or otherwise disclose your information in the following circumstances, in addition to any other circumstances permitted by law:

(a) Service providers and processors: cloud hosting, analytics, attribution, push-notification delivery, crash reporting, customer support, fraud prevention, payment processing, communication platforms, and similar vendors that process information on our behalf.

(b) Affiliates and corporate entities: current or future parent companies, subsidiaries, affiliates, joint ventures, and corporate partners.

(c) Business transfers: in connection with any merger, acquisition, restructuring, financing, sale of assets, bankruptcy, dissolution, or similar event, in which case your information may be transferred to or accessed by the resulting entity or its agents.

(d) Legal, safety, and security disclosures: to comply with applicable law, regulations, subpoenas, court orders, governmental requests, or legal process; to enforce our agreements; to investigate or prevent fraud, abuse, security incidents, or harm; to protect rights, property, or safety; or to cooperate with law enforcement.

(e) Advertising and marketing partners: ad networks, attribution platforms, audience-targeting providers, and similar partners, including for personalized and non-personalized advertising, retargeting, and measurement.

(f) Aggregated or de-identified data: we may share information that has been aggregated, anonymized, pseudonymized, or otherwise stripped of direct identifiers with any third party for any purpose, without further notice or restriction.

(g) Other purposes with notice: any other purpose described to you at the time of collection, or for which you provide consent.

To the fullest extent permitted by law, you acknowledge and agree that EverChapter may share, transfer, sell, license, or otherwise disclose your information for any of the purposes above and for additional lawful business purposes that may arise, including evolving commercial uses of data.

6. Advertising and analytics

We and our partners may use cookies, SDKs, mobile identifiers (including IDFA where permitted), and similar technologies to deliver advertising, measure ad performance, build audiences, and conduct analytics. Where required by applicable law or platform policy, we will request your permission (such as through Apple's App Tracking Transparency prompt) before engaging in certain tracking activities. If you decline, we may still process information for purposes that do not require your consent.

7. International data transfers

We may store, transfer, and process your information in any country in which we, our affiliates, or our service providers operate, including the United States and other jurisdictions whose data-protection laws may differ from those in your country. By using the Service, you consent to such transfers to the fullest extent permitted by applicable law. Where required, we use appropriate safeguards (such as standard contractual clauses) for international transfers of personal information.

8. Data retention

We retain information for as long as we deem necessary to provide the Service, comply with legal obligations, resolve disputes, enforce agreements, support business operations, and fulfill the purposes described in this Policy. Retention periods may vary based on the type of information, the purpose of processing, technical limitations, backup systems, and legal requirements. We are not obligated to delete information solely because your account is inactive or has been closed, except where required by law.

9. Security

We implement reasonable administrative, technical, and organizational measures designed to protect your information. However, no system is perfectly secure, and we cannot guarantee the security of your information. To the fullest extent permitted by law, we disclaim liability for unauthorized access, loss, alteration, or disclosure of your information, including incidents resulting from third-party conduct, security vulnerabilities, or events beyond our reasonable control.

10. Your choices

Depending on your jurisdiction, you may have rights regarding your personal information, such as the right to access, correct, delete, restrict, object to, or port certain information, and the right to withdraw consent for certain processing. To make a request, contact us using the information in section 17. We may verify your identity before processing requests, and we may decline requests as permitted by law (for example, where information is required for security, legal compliance, fraud prevention, or our legitimate business interests). Even where you exercise rights, we may retain certain information as permitted by law.

You may also be able to:

  • Adjust device notification permissions in your device settings;
  • Manage tracking permissions through your device's privacy settings;
  • Manage subscription settings through your platform account (such as Apple ID);
  • Close your account by contacting us, subject to limitations described in this Policy and applicable law.

11. Children's privacy

The Service is not directed to children under 13 (or the equivalent minimum age in your jurisdiction), and we do not knowingly collect personal information from children under that age without legally valid parental consent. If you believe a child has provided personal information without proper consent, contact us so we can review and, where required by law, delete the information.

12. California residents (CCPA / CPRA)

California residents may have specific rights regarding their personal information, including rights to know, delete, correct, limit certain uses of sensitive personal information, and opt out of "sale" or "sharing" as defined under California law. To exercise these rights, contact us using the information in section 17. We will respond as required by applicable law. We do not knowingly "sell" or "share" personal information of minors under 16 in the manner regulated by California law without the legally required consent. Subject to applicable law, the categories of information we may collect, use, disclose, sell, or share are described in this Policy.

13. EEA, UK, and similar jurisdictions

If you are located in the European Economic Area, United Kingdom, or another jurisdiction with similar laws, you may have rights to access, correct, delete, restrict processing, object to processing, port your information, and lodge a complaint with your local data-protection authority. The data controller for purposes of those laws is EverChapter or its designated operating entity, identified in our app listing or support page.

14. Automated decision-making and profiling

We may use automated systems, including statistical and machine-learning systems, to personalize content, recommend books, suggest quests, generate insights, score engagement, detect fraud or abuse, and improve the Service. Where required by law, you may have rights related to such processing; you can contact us to learn more or to exercise applicable rights.

15. Third-party services and links

The Service may rely on or link to third-party services (such as Firebase, Google Sign-In, Apple Sign-In, book metadata providers, StoreKit, analytics providers, advertising providers, and cloud infrastructure). These services have their own privacy practices and we are not responsible for them. Review their privacy notices before using them.

16. Changes to this Privacy Policy

We may update this Privacy Policy at any time. If changes are material, we may notify you in the app, by email, or through other reasonable means. Continued use of the Service after the updated Policy takes effect constitutes your acceptance of the updates to the fullest extent permitted by applicable law.

17. Contact

For privacy questions, requests, or concerns, contact us at contact@zero-day-technology.com. Please include sufficient information for us to verify your identity and to respond to your request.

18. Acknowledgment

By using the Service, you acknowledge that you have had a meaningful opportunity to review this Privacy Policy, that you understand it, and that you agree to its terms. To the fullest extent permitted by applicable law, you waive any claim based on alleged lack of notice, lack of consent, or lack of opportunity to review.