# OpenWind vs iStreams Dover Strait

The clearest difference is in-app purchases: OpenWind at none against iStreams Dover Strait's 6. OpenWind also leads on update cadence (fortnightly vs every 3 months) and device support (5 vs 2). On price and ads there is nothing between them.

Both are free to download. iStreams Dover Strait sells 6 one-off in-app purchases. OpenWind asks for nothing beyond the download.

OpenWind ships an update fortnightly, iStreams Dover Strait every 3 months. The most recent releases landed on October 7, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | OpenWind | iStreams Dover Strait |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/openwind/id1214386697/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 months |
| Monetization | Free | — |
| Size | 52 MB | 39 MB |
| Requires iOS | **12.1** | 18.4 |
| Devices | **iPhone, iPad, iPod, Mac, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Michael Liesenberg](https://appshunter.io/developer/1214386696) | [Navtech Software](https://appshunter.io/developer/355517263) |

## What reviewers say

### OpenWind

[App page](https://appshunter.io/ios/app/openwind/id1214386697)

This application connects to a specialized instrument to display real-time sailing data, including vessel pitch and roll, compass readings, and wind speed and direction. It also provides insights into the instrument's battery level and Bluetooth connection strength. The app requires a connection to the OW instrument to function.

**Highlights:** Real-time sailing data display, Vessel pitch and roll monitoring, True and apparent wind data, Compass and course over ground, Instrument battery level, Bluetooth connection strength

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


### iStreams Dover Strait

[App page](https://appshunter.io/ios/app/istreams-dover-strait/id1455616051)

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock 'Set' tool | $1.99 | one-time |
| Dover Tides 2019 | $2.99 | one-time |
| 6 Month Subscription | $2.99 | one-time |
| 1 Month Subscription | $2.99 | one-time |
| Unlock CTS tool | $3.99 | one-time |
| 1 Year Subscription | $5.99 | one-time |


## Frequently asked questions

### Is OpenWind free?

OpenWind is free to download, with no in-app purchases.

### Is iStreams Dover Strait free?

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

### Do OpenWind or iStreams Dover Strait have ads?

Neither OpenWind nor iStreams Dover Strait shows ads.

### Which is updated more often, OpenWind or iStreams Dover Strait?

OpenWind ships an update fortnightly, and iStreams Dover Strait every 3 months. Most recently, OpenWind was updated on October 7, 2026 and iStreams Dover Strait on October 12, 2026.

---

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