Not available outside the US
Why is it available for download and purchase outside of the US if maps aren’t available?
Free
In-App Purchases
About
Navigate waterways with confidence using official NOAA charts, real-time tide-adjusted depth, and comprehensive marine weather forecasts. Receive automatic hazard alerts and plan your trips with offline map access. Log your boating excursions with distance, duration, and speed tracking.
✓Official NOAA nautical charts
✓Tide-adjusted depth calculations
✓Marine weather forecasts
✓Offline chart downloads
✓Shallow water alerts
✓Trip logging
Show original description
+3
What's New in Keel
1.0.4
November 6, 2026
We've improved the overall experience in 'Keel: Boating GPS & Charts', making it smoother, faster, and more reliable for all users.
3
Subscriptions & In-App Purchases
Pro Weekly
Pro Access
$5.997 Days
Charts
User reviews
Developer apps
FAQ
What is Keel's primary function?
Keel provides official NOAA nautical charts, real-time tide-adjusted depth calculations, and marine weather forecasts for recreational boaters. It aims to enhance navigation confidence on the water.
How does Keel calculate water depth?
Keel combines official chart data with live tide station updates and your boat's draft to calculate the exact water depth under your vessel in real-time.
Does Keel work offline?
Yes, Keel allows you to download high-resolution NOAA marine charts for offline use, ensuring seamless navigation even without a cellular signal.
What kind of marine weather information does Keel offer?
Keel provides hourly marine weather forecasts, including wind speed, wind gusts, wave height, water temperature, tide curves, and sunrise/sunset times for your specific location.
What are the subscription options for Keel?
Keel offers several subscription plans, including 'Pro Weekly' at $5.99 for 7 days, and two 'Pro Yearly' options at $19.99 and $39.99 per year.
Is Keel suitable for primary navigation?
Keel is designed as a supplementary informational tool for recreational boating. It is not intended for primary navigation, and users should always maintain a proper lookout and use official paper charts or dedicated navigation equipment.
What devices does Keel support?
Keel is available for iPhone and iPod devices.
How often is Keel updated?
The latest version of Keel is 1.0.4, and it was last updated on November 6, 2026. Updates typically occur to improve features and reliability.
