# SpanSet Payload Controller vs iVSP

The clearest difference is update cadence: SpanSet Payload Controller at every 2 months against iVSP's every 21 months. 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.

SpanSet Payload Controller ships an update every 2 months, iVSP every 21 months. The most recent releases landed on May 17, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | SpanSet Payload Controller | iVSP |
| --- | --- | --- |
| 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 2 months** | Every 21 months |
| Monetization | — | Free |
| Size | 7 MB | 384 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Span Set GmbH & Co. KG](https://appshunter.io/developer/569512606) | [Voith Digital Solutions Inc](https://appshunter.io/developer/1281566238) |

## What reviewers say

### SpanSet Payload Controller

[App page](https://appshunter.io/ios/app/spanset-payload-controller/id946925049)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is SpanSet Payload Controller free?

SpanSet Payload Controller is free to download, with no in-app purchases.

### Is iVSP free?

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

### Do SpanSet Payload Controller or iVSP have ads?

Neither SpanSet Payload Controller nor iVSP shows ads.

### Which is updated more often, SpanSet Payload Controller or iVSP?

SpanSet Payload Controller ships an update every 2 months, and iVSP every 21 months. Most recently, SpanSet Payload Controller was updated on May 17, 2026 and iVSP on September 11, 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.*