# app4sail lite vs CH16

The clearest difference is review sentiment: CH16 at 100% against app4sail lite's 0%. CH16 also leads on update cadence (every 2 months vs every 4 months). app4sail lite's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price, 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. app4sail lite asks for nothing beyond the download.

app4sail lite ships an update every 4 months, CH16 every 2 months. The most recent releases landed on September 10, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | app4sail lite | CH16 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/app4sail-lite/id641322268/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 9 MB | 80 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [anton van oosten](https://appshunter.io/developer/641322651) | [Global SAR Hub](https://appshunter.io/developer/1888797457) |

## What reviewers say

### app4sail lite

[App page](https://appshunter.io/ios/app/app4sail-lite/id641322268)

This nautical navigation application utilizes free S57 vector charts for charting. It provides essential navigation tools for mariners on iOS devices.

**Highlights:** S57 nautical vector charts, Free chart usage, Nautical navigation, iOS compatible

**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 app4sail lite free?

app4sail lite is free to download, with no in-app purchases.

### Is CH16 free?

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

### Do app4sail lite or CH16 have ads?

CH16 shows ads; app4sail lite does not.

### Which is updated more often, app4sail lite or CH16?

app4sail lite ships an update every 4 months, and CH16 every 2 months. Most recently, app4sail lite was updated on September 10, 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.*