# iStreams Portland vs eOceanic

The clearest difference is review sentiment: iStreams Portland at 100% against eOceanic's 0%. eOceanic's advantage is update cadence (monthly vs every 3 months) and iOS requirement (13.0 vs 18.6). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. iStreams Portland sells 4 one-off in-app purchases and eOceanic sells 1 in-app purchase, starting at $49.99 per year. Whichever you choose, the download price is not the number that matters.

iStreams Portland ships an update every 3 months, eOceanic monthly. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | iStreams Portland | eOceanic |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 38 MB | 83 MB |
| Requires iOS | 18.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Navtech Software](https://appshunter.io/developer/355517263) | [eOceanic Limited](https://appshunter.io/developer/1801941274) |

## What reviewers say

### iStreams Portland

[App page](https://appshunter.io/ios/app/istreams-portland/id1455232883)

Access Portland's tidal stream atlas instantly, even offline. Understand tidal flow quickly and accurately for sailing, coastal navigation, and passage planning. Features real-time charts, automatic updates, and navigation tools.

**Highlights:** Real-time tidal stream charts, Offline functionality, Automatic chart updates, Swipeable tidal hours, Interpolated Rate Calculator, Tidal Set Tool (IAP), Course to Steer (IAP)

**In-app purchases (4)**

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


### eOceanic

[App page](https://appshunter.io/ios/app/eoceanic/id6743214768)

Empowering boaters with comprehensive sailing intelligence for the English and Irish coasts. Download charting, tidal data, and more for offline use, ensuring a safe and enjoyable experience at sea.

**Highlights:** Offline charting and tidal data, Discover nearby havens and routes, Extensive resource search, Raster charts with seamless scaling, Hazard and danger alerts, Man-Over-Board (MOB) function, Logging and progress tracking

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| eOceanic Subscription | $49.99 | per year |


## Frequently asked questions

### Is iStreams Portland free?

iStreams Portland is free to download, with in-app purchases available.

### Is eOceanic free?

eOceanic is free to download, with in-app purchases available.

### Do iStreams Portland or eOceanic have ads?

Neither iStreams Portland nor eOceanic shows ads.

### Which is updated more often, iStreams Portland or eOceanic?

iStreams Portland ships an update every 3 months, and eOceanic monthly. Most recently, iStreams Portland was updated on November 2, 2026 and eOceanic on November 4, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*