Rhumb: Sea Charts & Navigation
The sea chart that just works
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
The whole world is on the chart from the first launch. Plan a route across an ocean without buying a chart pack for each region it crosses.
Open Rhumb and the whole world is already on the chart. Most sea-chart apps sell the chart one region at a time, so planning a long passage means buying pack after pack. In Rhumb the chart covers every ocean, included and free, and your position, course, and speed are live on the screen with no account required. You can plan a passage across the Atlantic without paying for the water it crosses. Because Rhumb carries nothing extra, it costs a fraction of what the professional apps charge, and when you are ready to plan, Rhumb Premium draws a route that avoids land.
Rhumb is built by a Yachtmaster Offshore skipper who uses it on his own passages. It is made for people learning to navigate — RYA Day Skipper level and below — for skippers who forget the details between seasons, and for anyone in a dinghy, RIB, kayak, or on a paddleboard who wants a clear view of the seamarks around them. Crew on someone else's boat get their own view of position, course, and speed from the free tier.
THE CHART
• The whole world's chart included — buoys, beacons, lights, and harbour marks from OpenSeaMap on a clean base map
• North-up, always — the chart never rotates; your boat and your course do
• Day, twilight, and night appearances that switch automatically with the sun at your position
• Your position, course over ground (COG), and speed over ground (SOG), live on the chart
• Rhumb needs a data connection for the chart today; offline charts are in development
NAVIGATE
• Dividers: rhumb-line distance and bearing between any two points, in nautical miles and °T
• Full-screen instruments: COG and SOG, readable at arm's length at the helm
• Markers: name and categorise anchorages, hazards, and marinas — stored in your own private iCloud, where only you can read them
RHUMB PREMIUM
• Auto-routing: tap waypoints and get a route that avoids land, with distance for every leg
• Average SOG over the last minute, ten minutes, and hour — live on the instruments, kept complete in the background. Watch the tide help or hurt on passage.
• £19.99 a year or £3.99 a month, with a one-week free trial. The chart and navigation essentials stay free, and you can cancel in your Apple Account settings at any time.
The subscription renews automatically unless cancelled at least 24 hours before the end of the current period. Payment is charged to your Apple Account.
IMPORTANT
Rhumb is an aid for recreational planning. It does not replace official charts, official publications, or safe navigation practice. Routes avoid land. They do not check depth, so always verify depths against your chart.
Terms of Use: https://rhumbapp.com/terms
Privacy Policy: https://rhumbapp.com/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Yes Please Boats Ltd, 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 Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Yes Please Boats Ltd
- Size
- 10.5 MB
- Category
- Navigation
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Location
- This app may use your location even when it isn’t open, which can decrease device battery life.
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Rhumb Premium Annual $19.99
- Rhumb Premium Monthly $3.99
- Copyright
- © 2026 Yes Please Boats