# iStreams West Scotland — Live and future tidal streams

> West Scotland tidal stream atlas with offline functionality for navigation. (iPhone/iPad app by Navtech Software.)

- Source: https://appshunter.io/ios/app/istreams-west-scotland/id1459096280 (this page in markdown: same URL + `.md`)
- Developer: [Navtech Software](https://appshunter.io/developer/355517263)
- Category: Navigation, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.4 · 44 MB
- Languages: American English, Danish, Dutch, French (France), German (Germany), Norwegian Bokmål
- Released: 2019-04-10
- Data updated: 2026-08-22
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/istreams-west-scotland/id1459096280/reviews.md

## What is iStreams West Scotland?

iStreams gives you instant access to the West Scotland 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.
Show boat position on the chart

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 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

## Key features

- Real-time tidal stream charts
- Offline functionality
- Automatic chart updates
- Swipe through tidal hours
- Interpolated Rate Calculator
- Tidal Set Tool (IAP)
- Course to Steer (IAP)

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 6 Month Subscription | $2.99 | one-time |
| 1 Month Subscription | $2.99 | one-time |
| 1 Year Subscription | $5.99 | one-time |
| Unlock Set tool | $1.99 | one-time |
| Unlock CTS tool | $3.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/istreams-west-scotland/id1459096280/reviews.md

### 1/5 — Simply wrong tidal information. Dangerous

*2019-07-19*

Don’t use

**Developer response:** The app is available to download and try for free, using 2019 data, if you like it subscribe for 2020 (or current year) tidal data

## Frequently asked questions about iStreams West Scotland

### What is iStreams West Scotland?

iStreams West Scotland is a navigation app that provides real-time tidal stream charts for the West Scotland region. It automatically aligns with High Water at Dover and offers full offline functionality for users.

### Is iStreams West Scotland free to use?

The core features of iStreams West Scotland are free to use, including real-time tidal stream charts and offline functionality. However, advanced tools like the Tidal Set Tool and Course to Steer (CTS) require an in-app purchase.

### Does iStreams West Scotland work offline?

Yes, iStreams West Scotland offers full offline functionality for its charts and tools, meaning you can use it without an internet signal. Only the forecast link requires a connection.

### What devices support iStreams West Scotland?

iStreams West Scotland is available for iPhone and iPad devices. It is rated for ages 4 and up.

### How often is iStreams West Scotland updated?

The latest version of iStreams West Scotland is 3.09, last updated on May 30, 2026. Updates ensure the app remains reliable and accurate for navigation.

### Can I calculate tidal stream rates with iStreams West Scotland?

Yes, iStreams West Scotland includes an Interpolated Rate Calculator that allows you to instantly calculate stream rates between neaps and springs. This is a core feature available for free.

### What are the in-app purchases in iStreams West Scotland?

The in-app purchases for iStreams West Scotland include the Tidal Set Tool, which precisely measures the true direction of tidal stream arrows, and the Course to Steer (CTS) tool, which calculates the correct heading to maintain your intended course.

### How does iStreams West Scotland determine tidal times?

iStreams West Scotland automatically selects the nearest High Water at Dover and uses that time to display the corresponding tidal stream chart for West Scotland. This ensures accurate, real-time data.

## Version history (last 5 releases)

### 3.10 — 2026-08-12

Localisations
When using outlook, selected date/time now persists when changing chart between North and South
Minor bug fixes

### 3.09 — 2026-05-30

Chart data card now draggable to preferred position
Fix for malformed text when user has set large font for device

### 3.07 — 2026-05-27

Improved performance
Updated user interface
bug fixes

### 3.06 — 2026-05-25

Improved performance
Updated user interface

### 2.93 — 2025-12-02

Updated for iOS 26

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## More apps by Navtech Software

- [E6b Pilot — Flight Computer](https://appshunter.io/ios/app/e6b-pilot-flight-computer/id368495864)
- [iPlotter Solent](https://appshunter.io/ios/app/iplotter-solent/id397677340)
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- [iHeatLoss](https://appshunter.io/ios/app/iheatloss/id680564773)
- [Easter Match Puzzle](https://appshunter.io/ios/app/easter-match-puzzle/id836681161)
- [iStreams Channel Islands](https://appshunter.io/ios/app/istreams-channel-islands/id1223503159)

All apps by Navtech Software: https://appshunter.io/developer/355517263

## Related topics

[istreams west scotland](https://appshunter.io/ios/topics/istreams-west-scotland) · [istreams north sea](https://appshunter.io/ios/topics/istreams-north-sea)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-22.*