# nautiMessage vs CH16

The clearest difference is in-app purchases: nautiMessage at none against CH16's 2. nautiMessage also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. CH16 sells 2 in-app purchases, starting at $0.99 per month. nautiMessage asks for nothing beyond the download.

nautiMessage ships an update monthly, CH16 every 2 months. The most recent releases landed on September 18, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | nautiMessage | CH16 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 12 MB | 80 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Miravista Interactive L.L.C.](https://appshunter.io/developer/1696901582) | [Global SAR Hub](https://appshunter.io/developer/1888797457) |

## What reviewers say

### nautiMessage

[App page](https://appshunter.io/ios/app/nautimessage/id6475951358)

**Features:** macOS Compatibility

**In-app purchases:** none


### CH16

[App page](https://appshunter.io/ios/app/ch16/id6761360179)

This maritime safety app provides instant access to global rescue coordination centers and features tools for generating distress messages and planning voyages. It offers real-time location tracking for man overboard situations and works offline, ensuring safety at sea.

**Highlights:** Global maritime rescue center directory, Interactive SRR zone map, GMDSS-compliant distress message generator, Man Overboard (MOB) mode with GPS tracking, Passage Plan for voyage declaration, Offline functionality, Multilingual support

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CH16 Pro | $0.99 | per month |
| CH16 Pro Lifetime | $4.99 | one-time |


## Frequently asked questions

### Is nautiMessage free?

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

### Is CH16 free?

CH16 is free to download, with in-app purchases available.

### Do nautiMessage or CH16 have ads?

CH16 shows ads; nautiMessage does not.

### Which is updated more often, nautiMessage or CH16?

nautiMessage ships an update monthly, and CH16 every 2 months. Most recently, nautiMessage was updated on September 18, 2026 and CH16 on September 6, 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.*