Privacy Policy

Last updated: July 2026

Overview

CodexTutor (“we,” “our,” or “us”) is operated by K12TeacherTools. This Privacy Policy explains how we collect, use, and protect your information when you use the CodexTutor mobile application and related services.

Information we collect

By default, we collect nothing. CodexTutor works fully offline: the texts ship with the app, and your reading progress is stored on your device. You can use it without an account and without ever connecting to us.

If you choose to sign in to sync progress across devices, we then collect the minimum needed to do that:

  • Account information: Your name and email address when you sign in with Apple or Google.
  • Reading progress: Which passages you have marked as read, and which texts are in your library.
  • Preferences: Your selected language and active text.

We do not collect location data, contacts, photos, payment information, or any data unrelated to your use of the app.

How we use your data

  • Sync your reading progress and library across your devices, if you have signed in.
  • Improve the service through aggregated, anonymized usage patterns.

We do not sell, rent, or share your personal data with third parties for advertising or marketing purposes.

Third-party services

We use the following third-party services to operate CodexTutor:

  • Clerk — handles sign-in with Apple and Google. Your credentials are managed by Clerk's infrastructure and are never stored directly by us.
  • Neon (neon.tech) — cloud PostgreSQL database where your study progress is stored. All connections are encrypted via TLS.
  • Cloudflare R2 — hosts audio pronunciation files. No personal data is sent to Cloudflare.

Each third-party service is governed by its own privacy policy. We encourage you to review them.

Data storage and security

If you have signed in, your synced data is stored in a PostgreSQL database hosted by Neon with encryption in transit (TLS) and at rest. If you have not, it stays on your device. We do not store passwords (authentication is delegated to Clerk), and we never handle payment information because nothing is for sale. We implement reasonable administrative and technical safeguards to protect your data, but no method of electronic storage is 100% secure.

Data retention

We retain your account and study data for as long as your account is active. If you request account deletion, we will delete all personally identifiable data within 30 days. Anonymized, aggregated statistics (e.g., total passages read across all users) may be retained indefinitely.

Children's privacy

CodexTutor is not directed at children under 13. We do not knowingly collect personal information from children under 13. If you are a parent or guardian and believe your child has provided us with personal information, please contact us and we will promptly delete it.

Your rights

You have the right to:

  • Access your personal data by contacting us.
  • Delete your account and all associated data at any time.
  • Export your study data upon request.

To exercise any of these rights, contact us at the address below. We will respond within 30 days.

Changes to this policy

We may update this Privacy Policy from time to time. We will notify you of material changes by updating the “Last updated” date at the top of this page. Your continued use of CodexTutor after changes constitutes acceptance of the updated policy.

Contact

For privacy-related questions or to exercise your data rights, contact us at reecep@k12teachertools.com.