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iStreams North Sea (E)

by Colin Porteous more by this developer →

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Category: Navigation

Description

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

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iStreams Irish Sea by Colin Porteous	—	—	compare
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Growth

Change in ratings, scaled to each window from the real gap between crawls. A window needs a full period of history before it reports anything.

History

Tracking since 09/05/2026. History accumulates as changes are observed — check back soon.