# app4sail vs Qastor

The clearest difference is price: Qastor at Free against app4sail's $4.99. app4sail's advantage is in-app purchases (none vs 3). On update cadence, ads, device support and iOS requirement there is nothing between them.

Qastor is free to download; app4sail costs $4.99 up front. Qastor sells 3 in-app purchases, starting at $619.00 per year. app4sail asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | app4sail | Qastor |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Size | 8 MB | 257 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [anton van oosten](https://appshunter.io/developer/641322651) | [Quality Positioning Services](https://appshunter.io/developer/1449631902) |

## What reviewers say

### app4sail

[App page](https://appshunter.io/ios/app/app4sail/id641578574)

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

**In-app purchases:** none


### Qastor

[App page](https://appshunter.io/ios/app/qastor/id1449631903)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Navigation | $619.00 | per year |
| Navigation + Docking | $989.00 | per year |
| 14-day Trial | Free | one-time |


## Frequently asked questions

### Is app4sail free?

app4sail costs $4.99, with no in-app purchases.

### Is Qastor free?

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

### Do app4sail or Qastor have ads?

Neither app4sail nor Qastor shows ads.

### Which is updated more often, app4sail or Qastor?

app4sail ships an update every 3 months, and Qastor every 3 months. Most recently, app4sail was updated on October 24, 2026 and Qastor on October 23, 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.*