# iVSP vs HSA

The clearest difference is update cadence: HSA at every 2 months against iVSP's every 21 months. HSA also leads on iOS requirement (9.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

iVSP ships an update every 21 months, HSA every 2 months. The most recent releases landed on October 15, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | iVSP | HSA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ivsp/id1451717453/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 384 MB | 6 MB |
| Requires iOS | 13.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Voith Digital Solutions Inc](https://appshunter.io/developer/1281566238) | [杏生 卢](https://appshunter.io/developer/1094592555) |

## What reviewers say

### iVSP

[App page](https://appshunter.io/ios/app/ivsp/id1451717453)

Experience ship navigation with Voith propulsion systems. Explore the mechanics and hydrodynamics of Voith Schneider Propellers (VSP) and their unique thrust capabilities on various vessel types. Learn about the innovative technology behind this propulsion system.

**Highlights:** Steer ships with Voith propulsion, Explore Voith Schneider Propeller mechanics, Understand VSP hydrodynamics, Simulate various vessel types, Learn about VSP thrust generation

**Features:** macOS Compatibility

**In-app purchases:** none


### HSA

[App page](https://appshunter.io/ios/app/hsa-10pro/id6446188767)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iVSP free?

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

### Is HSA free?

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

### Do iVSP or HSA have ads?

Neither iVSP nor HSA shows ads.

### Which is updated more often, iVSP or HSA?

iVSP ships an update every 21 months, and HSA every 2 months. Most recently, iVSP was updated on October 15, 2026 and HSA on October 13, 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.*