# Coaster vs CH16

Coaster and CH16 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Coaster sells 1 in-app purchase, starting at $4.99 per year and CH16 sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 23, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | Coaster | CH16 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 19 MB | 80 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Michael Mathieu](https://appshunter.io/developer/1451289797) | [Global SAR Hub](https://appshunter.io/developer/1888797457) |

## What reviewers say

### Coaster

[App page](https://appshunter.io/ios/app/coaster-coast-watcher/id6642650729)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $4.99 | per year |


### 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 Coaster free?

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

### Is CH16 free?

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

### Do Coaster or CH16 have ads?

Both Coaster and CH16 show ads.

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

Coaster ships an update every 2 months, and CH16 every 2 months. Most recently, Coaster was updated on September 23, 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.*