Azimuth Systems
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THE EOOW & ETO BIBLE · LEGAL

The EOOW & ETO Bible — Privacy Policy

LAST UPDATED: AUGUST 2026

1. Who We Are

Azimuth Systems Ltd (“we”, “us”, “our”) is the developer of The EOOW & ETO Bible, a mobile application for marine engineering exam preparation and engine-room reference. This policy applies to The EOOW & ETO Bible. We are a company registered in England and Wales, company number 17064299, with our registered office at First Floor, Swan Buildings, 20 Swan Street, Manchester, M4 5JW, United Kingdom. We are registered with the UK Information Commissioner’s Office under data protection registration reference ZC192137.

Contact: privacy@azimuthsystemsltd.com

2. What Data We Collect

  • Account information — your name and email address when you create an account.
  • Your chosen pathway — whether you are studying for EOOW or ETO, selected at signup, so the app presents the right modules to you. You can change it later.
  • Study progress — question results, module completion, XP, streaks, flashcard review history, and Part A exam simulator scores across the engineering modules.
  • Subscription status — whether you are on Free or Premium. Payment is handled entirely by Apple, Google and RevenueCat — we never see your card details.
  • Push notification token — a device identifier used solely to send you study reminders if you enable notifications.
  • Audio recordings — spoken answers you give to the AI Oral Examiner when practising your engineering oral. These are processed in real time to produce your grading report and are not stored permanently on our servers.
  • Referral code — if you share or redeem a referral code for The EOOW & ETO Bible.
  • Crash and error reports — anonymised diagnostic data sent to Sentry when the app crashes.

3. How We Use Your Data

  • To provide and personalise The EOOW & ETO Bible — showing the modules for your pathway, tracking progress, and scheduling spaced repetition.
  • To grade AI Oral Examiner sessions and return your verdict, score and examiner commentary.
  • To manage your subscription and restore purchases.
  • To send study reminder notifications (only if you opt in).
  • To diagnose bugs and improve app stability.
  • To process referrals (if you share or use a referral code).

We do not sell your data, use it for advertising, or share it with any third party beyond the processors listed below.

4. Third-Party Processors

  • Supabase — database and authentication (EU region).
  • RevenueCat — subscription management.
  • Anthropic — AI responses in the Oral Simulator. Audio is sent over HTTPS and processed in accordance with Anthropic's privacy policy. Anthropic does not use your data to train its models under the standard API terms.
  • Sentry — crash reporting.
  • Apple — Sign in with Apple, push notifications, App Store payments.
  • Google — Sign in with Google.

5. Data Retention

We retain your account and study data for as long as your account exists. If you delete your account (Settings → Account → Delete Account) all your personal data is permanently removed within 30 days.

6. Your Rights (GDPR / UK GDPR)

If you are based in the UK or EEA you have the right to:

  • Access the personal data we hold about you.
  • Correct inaccurate data.
  • Request deletion of your data (right to erasure).
  • Object to or restrict certain processing.
  • Data portability.

To exercise any of these rights, email privacy@azimuthsystemsltd.com. You also have the right to lodge a complaint with the ICO (UK) or your local supervisory authority.

7. Children

Our apps are not directed at children under 13. We do not knowingly collect personal data from anyone under 13.

8. Security

All data is transmitted over HTTPS. We use industry-standard encryption and row-level security in our database to protect your information.

9. Changes to This Policy

We may update this policy from time to time. Material changes will be notified in the app. The "last updated" date at the top of this page reflects the most recent revision.

10. Contact

Questions or concerns? Email us at privacy@azimuthsystemsltd.com.

Privacy FAQ

What data does The EOOW & ETO Bible collect?

Your name and email address, whether you chose the EOOW or the ETO pathway, your study progress (flashcard history, module completion, exam simulator scores), your subscription status, and — if you use the AI Oral Examiner — the audio of your spoken answers, processed in real time. We do not collect financial data; payments are handled by Apple and Google.

Does choosing EOOW or ETO change what you collect?

No. The pathway you pick only determines which modules and flashcards the app shows you. The categories of data we collect are identical either way.

Is my study data stored on my device or in the cloud?

Study progress is stored locally on your device using SQLite and synced to our Supabase database when you have an internet connection. The quick reference and offline features always work from local storage.

Can I delete my account and data?

Yes. Request deletion from Settings → Account → Delete Account inside The EOOW & ETO Bible, or email privacy@azimuthsystemsltd.com. We delete your data within 30 days of the request.