# Alert Diver vs Halcyon Dive Systems

The clearest difference is rating: Halcyon Dive Systems at 5.0 against Alert Diver's 4.0. Halcyon Dive Systems also leads on update cadence (every 3 weeks vs every 6 months) and monetization model (ad-supported vs free with in-app purchases). Alert Diver's advantage is device support (3 vs 1) and iOS requirement (11.0 vs 16.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Halcyon Dive Systems holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 4 and 8 respectively.

Alert Diver ships an update every 6 months, Halcyon Dive Systems every 3 weeks. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Alert Diver | Halcyon Dive Systems |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/alert-diver/id480608662/reviews) | **[5.0 (8 ratings)](https://appshunter.io/ios/app/halcyon-dive-systems-diving/id6738069654/reviews)** |
| Number of ratings | 4 | **8** |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 92 MB | 162 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Divers Alert Network](https://appshunter.io/developer/1482122935) | [Halcyon Dive Systems](https://appshunter.io/developer/1779189368) |

## What reviewers say

### Alert Diver

[App page](https://appshunter.io/ios/app/alert-diver/id480608662)

Explore dive industry insights, research, and safety information. Discover underwater photography, travel destinations, and marine environmental topics. This app provides valuable content for divers and enthusiasts.

**Highlights:** Dive industry research, Medical information, Dive safety guidelines, Underwater photography, Dive travel guides, Marine environmental topics

**Features:** macOS Compatibility

**In-app purchases:** none


### Halcyon Dive Systems

[App page](https://appshunter.io/ios/app/halcyon-dive-systems-diving/id6738069654)

This app helps divers log, track, and share their underwater experiences. It offers integration with dive computers, personalized settings, and a community forum for connecting with other divers.

**Highlights:** Symbios integration for dive computer settings, Detailed dive logging and progress tracking, Social logbook for sharing dive stories, Connect with a global diving community, Personalized dive tips and advice, Exclusive benefits for Halcyon owners

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

**In-app purchases:** none


## Frequently asked questions

### Is Alert Diver free?

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

### Is Halcyon Dive Systems free?

Halcyon Dive Systems is free to download, with no in-app purchases.

### Which has better reviews, Alert Diver or Halcyon Dive Systems?

Halcyon Dive Systems is rated higher. Alert Diver averages 4.0 out of 5 from 4 ratings, while Halcyon Dive Systems averages 5.0 from 8 ratings.

### Do Alert Diver or Halcyon Dive Systems have ads?

Neither Alert Diver nor Halcyon Dive Systems shows ads.

### Which is updated more often, Alert Diver or Halcyon Dive Systems?

Alert Diver ships an update every 6 months, and Halcyon Dive Systems every 3 weeks. Most recently, Alert Diver was updated on November 6, 2026 and Halcyon Dive Systems on November 4, 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.*