# Quota (Dualog) vs iVSP

The clearest difference is review sentiment: iVSP at 100% against Quota (Dualog)'s 2%. iVSP also leads on monetization model (free vs free with in-app purchases) and iOS requirement (13.0 vs 16.4). Quota (Dualog)'s advantage is update cadence (every 2 months vs 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.

Quota (Dualog) ships an update every 2 months, iVSP every 21 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Quota (Dualog) | iVSP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ivsp/id1451717453/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 2.4% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 21 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 47 MB | 384 MB |
| Requires iOS | 16.4 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dualog AS](https://appshunter.io/developer/1139734651) | [Voith Digital Solutions Inc](https://appshunter.io/developer/1281566238) |

## What reviewers say

### Quota (Dualog)

[App page](https://appshunter.io/ios/app/quota-dualog/id1139734652)

This app allows ship crew to manage their onboard internet access. It provides real-time usage tracking, allows purchasing additional data, and offers data-saving features for a fair and user-friendly experience.

**Highlights:** Real-time data and time usage tracking, Cross-device internet access management, In-app data top-ups, Data-saving alerts and tips, Automatic ship Wi-Fi detection for login, Daily breakdowns by carrier

**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 Quota (Dualog) free?

Quota (Dualog) is free to download, with no in-app purchases.

### Is iVSP free?

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

### Do Quota (Dualog) or iVSP have ads?

Neither Quota (Dualog) nor iVSP shows ads.

### Which is updated more often, Quota (Dualog) or iVSP?

Quota (Dualog) ships an update every 2 months, and iVSP every 21 months. Most recently, Quota (Dualog) was updated on November 6, 2026 and iVSP on November 2, 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.*