# Almicantarat vs CH16

The clearest difference is price: CH16 at Free against Almicantarat's $9.99. CH16 also leads on update cadence (every 2 months vs every 7 months). Almicantarat's advantage is in-app purchases (none vs 2) and ads (none vs shown). On review sentiment and device support there is nothing between them.

CH16 is free to download; Almicantarat costs $9.99 up front. CH16 sells 2 in-app purchases, starting at $0.99 per month. Almicantarat asks for nothing beyond the download.

Almicantarat ships an update every 7 months, CH16 every 2 months. The most recent releases landed on October 24, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Almicantarat | CH16 |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 64 MB | 80 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pierre-Louis Deschamps](https://appshunter.io/developer/1669948199) | [Global SAR Hub](https://appshunter.io/developer/1888797457) |

## What reviewers say

### Almicantarat

[App page](https://appshunter.io/ios/app/almicantarat/id1669948197)

This professional celestial navigation app allows users to accurately determine their position using a sextant to observe stars, planets, and the Sun. It features a 3D sky map and integrates with the device's native map for celestial fixes. Users can utilize either their current device location or dead reckoning for navigation.

**Highlights:** Sextant-based celestial observation, Accurate position fixing, 3D Sky Map (beta), Native map integration, Device location or dead reckoning

**Features:** Vision Pro support

**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 Almicantarat free?

Almicantarat costs $9.99, with no in-app purchases.

### Is CH16 free?

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

### Do Almicantarat or CH16 have ads?

CH16 shows ads; Almicantarat does not.

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

Almicantarat ships an update every 7 months, and CH16 every 2 months. Most recently, Almicantarat was updated on October 24, 2026 and CH16 on October 18, 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.*