iStreams North Sea (E)
Navigation
Free · In‑App Purchases
iStreams gives you instant access to the North Sea East tidal stream atlas, aligned to the current time using High Water at Dover — even when you're offline.
Whether you're sailing, navigating coastal waters, or passage planning, iStreams helps you understand tidal flow quickly and accurately.
Key Features:
Real-time tidal stream charts
Automatically displays the correct hourly chart based on the nearest Dover High Water time.
Fully offline functionality (forecast link requires a connection)
No signal? No problem. All charts and tools work without internet access.
Automatic chart updates
As time progresses, the app switches to the next valid tidal period.
Swipe forward and backward through tidal hours with ease.
Pinch to zoom and drag to explore details.
Toggle between Local Time and UTC.
Navigation Tools:
Interpolated Rate Calculator
* Instantly calculate stream rate between neaps and springs.
Tidal Set Tool (In-App Purchase)
* Measure the true direction of tidal stream arrows with precision.
Course to Steer (CTS) (In-App Purchase)
* Calculate the correct heading to maintain your intended course.
How It Works:
iStreams automatically selects the nearest High Water at Dover and displays the corresponding tidal stream chart.
Want to plan ahead or review earlier conditions? Simply select a date or swipe forward or backward through the tidal hours to view past or future data.
Why Choose iStreams?
Designed for sailors, navigators, and coastal users
Fast, clear, and easy-to-use interface
Accurate tidal data when you need it most
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Improved performance and updated user interface
The developer, Navtech Software, 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 Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Colin Porteous
- Size
- 42.1 MB
- Category
- Navigation
- Compatibility
Requires iOS 18.4 or later.
- iPhone
Requires iOS 18.4 or later. - iPad
Requires iPadOS 18.4 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- 1 Year subscription $5.99
- Unlock CTS tool $3.99
- Unlock Set tool $1.99
- 1 Month Subscription $2.99
- Unlock Set tool $1.99
- Copyright
- © 2026 Navtech Software