Compass Revision
Sailing theory, made clearer
Free · In‑App Purchases
Make your next study session count. Explore 31 course companions, try free samples, learn from explained answers and download owned courses for offline revision.
Make more sense of sailing theory, one topic at a time.
Compass Revision brings 31 independent course companions into one place. Explore navigation, tides, COLREGs, buoyage, marine radio and seamanship, with focused lessons and questions that help you work out what to study next.
FIND YOUR COURSE
Browse regional course collections and try free sample topics before signing in. Choose the subject and level that fit your plans, from introductory boating knowledge to more advanced theory revision.
TURN READING INTO RECALL
Read a lesson, practise topic questions and learn from the explanations. Use a Quick 10 session when time is short, revisit incorrect answers, save useful questions and try timed mock tests. Your progress helps you return to the topics that need more work.
KEEP YOUR LEARNING TOGETHER
Sign in to see your owned courses on Home and switch between them. Sync your learning with your Compass account when connected, so you can pick up across your devices.
TAKE YOUR STUDY OFFLINE
Download an owned course while connected, then read its lessons and practise without an internet connection. Free samples are also available offline. Reconnect to sync your progress. Signing in, purchasing, restoring purchases and downloading new content require internet access.
PRACTISE MARINE RADIO
Marine Radio course owners can open the simulator inside the app to build and check training calls. The simulator requires an internet connection. Microphone practice is optional, with permission and information about audio processing before use. Separate speaking cards let you rehearse offline without recording.
CHOOSE THE ACCESS YOU NEED
Start with free samples without creating an account. Full courses are optional one-time in-app purchases, not subscriptions, with the price shown before you buy. Existing Compass learners can sign in to access courses they already own. Restore purchases is available in Account.
INDEPENDENT LEARNING SUPPORT
Compass Revision is an independent educational study aid, not an official RYA training provider. It does not award qualifications or certify practical competence. It is not a navigation or emergency-response tool and does not replace official publications, local rules, qualified instruction or safe real-world judgement.
Privacy: https://www.compassrevision.com/privacy
Terms: https://www.compassrevision.com/terms
Support: https://www.compassrevision.com/contact
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The developer, Angry Chimp Productions, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Location
- Contact Info
- User Content
- Browsing History
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Richard Moore
- Size
- 62.1 MB
- Category
- Education
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - iPad
Requires iPadOS 16.4 or later.
- iPhone
- Languages
- English
- Age Rating
13+
- 13+
- Infrequent
Medical Treatment information
Alcohol, Tobacco, Drug Use or References
- In-App Purchases
Yes
- NZ Maritime VHF $17.99
- U.S. Coastal Navigation $59.00
- NZ Boatmaster $34.99
- Intermediate Coastal Nav $39.99
- NZ Day Skipper $22.99
- Australian Marine Radio $24.99
- Advanced Cruising $39.99
- ROC(M) $14.99
- Intermediate Cruising $24.99
- PPR $12.99
- Copyright
- © 2026 Richard Moore