# iAIS vs Sailing Master M

The clearest difference is rating: Sailing Master M at 5.0 against iAIS's 2.5. Sailing Master M also leads on update cadence (every 2 months vs every 10 months). iAIS's advantage is ratings volume (6 vs 1) and iOS requirement (9.0 vs 17). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. iAIS sells 1 one-off in-app purchase and Sailing Master M sells 1 in-app purchase, starting at $11.99 per year. Whichever you choose, the download price is not the number that matters.

Sailing Master M holds the better App Store score, 5.0 against 2.5. That said, the two scores are not equally well evidenced: iAIS has 6 ratings behind it against 1, so its average is the more settled of the two.

iAIS ships an update every 10 months, Sailing Master M every 2 months. The most recent releases landed on October 27, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | iAIS | Sailing Master M |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (6 ratings)](https://appshunter.io/ios/app/iais/id394667307/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sailing-master-m/id1566599912/reviews)** |
| Number of ratings | **6** | 1 |
| Positive reviews | 30.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 2 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 66 MB | 25 MB |
| Requires iOS | **9.0** | 17 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [DigitalYacht Ltd.](https://appshunter.io/developer/394667310) | [Pekka Leppanen](https://appshunter.io/developer/1566599914) |

## What reviewers say

### iAIS

[App page](https://appshunter.io/ios/app/iais/id394667307)

Visualize AIS targets relative to your device's position, displaying detailed information about each target. Overlay AIS data on Navionics charts and share your boat's live position with others. This app is intended for basic navigation reference only.

**Highlights:** AIS target plotting, NMEA data instruments, AIS target details display, Navionics chart overlay, Live boat position sharing, GPS and Wind data view

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Navionics Charts Upgrade | $9.99 | one-time |


### Sailing Master M

[App page](https://appshunter.io/ios/app/sailing-master-m/id1566599912)

This app provides comprehensive sailing data and performance optimization on various Apple devices. It displays over 35 sailing measurements from boat instruments, polars tables, and nautical charts, offering detailed wind, route, and map views. Connectivity is established through NMEA 0183 Wi-Fi gateways.

**Highlights:** Configurable data displays, 35+ sailing measurements, Wind, route, and map displays, NMEA 0183 Wi-Fi connectivity, Polars table integration, Nautical chart overlays

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro annual | $11.99 | per year |


## Frequently asked questions

### Is iAIS free?

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

### Is Sailing Master M free?

Sailing Master M is free to download, with in-app purchases available.

### Which has better reviews, iAIS or Sailing Master M?

Sailing Master M is rated higher. iAIS averages 2.5 out of 5 from 6 ratings, while Sailing Master M averages 5.0 from 1 ratings.

### Do iAIS or Sailing Master M have ads?

Neither iAIS nor Sailing Master M shows ads.

### Which is updated more often, iAIS or Sailing Master M?

iAIS ships an update every 10 months, and Sailing Master M every 2 months. Most recently, iAIS was updated on October 27, 2026 and Sailing Master M 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.*