# iStreams Solent vs iVMS

The clearest difference is in-app purchases: iVMS at none against iStreams Solent's 9. iVMS also leads on iOS requirement (15.1 vs 18.2). On price, update cadence, ads and device support there is nothing between them.

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

iStreams Solent ships an update every 3 months, iVMS every 2 months. The most recent releases landed on October 12, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | iStreams Solent | iVMS |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free with in-app purchases | — |
| Size | 38 MB | 130 MB |
| Requires iOS | 18.2 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Navtech Software](https://appshunter.io/developer/355517263) | [HAS INNOVATIONS TRADING LLC](https://appshunter.io/developer/1573097110) |

## What reviewers say

### iStreams Solent

[App page](https://appshunter.io/ios/app/istreams-solent/id1454510704)

This app provides real-time Solent tidal stream data, displaying hourly charts and tools to measure tide set and interpolated rates. It functions offline and allows for future planning by selecting different dates.

**Highlights:** Real-time Solent tidal stream charts, Offline functionality, Tide set and rate measurement tools, Automatic Portsmouth HW time selection, Date selection for future planning, Zoomable charts, Boat position display on chart

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock 'Set' tool | $1.99 | one-time |
| Portsmouth 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 |


### iVMS

[App page](https://appshunter.io/ios/app/ivms/id1573097108)

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

**In-app purchases:** none


## Frequently asked questions

### Is iStreams Solent free?

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

### Is iVMS free?

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

### Do iStreams Solent or iVMS have ads?

Neither iStreams Solent nor iVMS shows ads.

### Which is updated more often, iStreams Solent or iVMS?

iStreams Solent ships an update every 3 months, and iVMS every 2 months. Most recently, iStreams Solent was updated on October 12, 2026 and iVMS on October 9, 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.*