# Halcyon Dive Systems vs Okeanun

The clearest difference is ads: Halcyon Dive Systems at none against Okeanun's shown. On price, update cadence, in-app purchases and device support 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 ships an update every 3 weeks, Okeanun monthly. The most recent releases landed on October 21, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Halcyon Dive Systems | Okeanun |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (8 ratings)](https://appshunter.io/ios/app/halcyon-dive-systems-diving/id6738069654/reviews)** | — |
| Number of ratings | **8** | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Ad-supported | — |
| Size | 162 MB | 34 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Halcyon Dive Systems](https://appshunter.io/developer/1779189368) | [Okeanun](https://appshunter.io/developer/6792802280) |

## What reviewers say

### 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


### Okeanun

[App page](https://appshunter.io/ios/app/okeanun/id6792809761)

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

**In-app purchases:** none


## Frequently asked questions

### Is Halcyon Dive Systems free?

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

### Is Okeanun free?

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

### Do Halcyon Dive Systems or Okeanun have ads?

Okeanun shows ads; Halcyon Dive Systems does not.

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

Halcyon Dive Systems ships an update every 3 weeks, and Okeanun monthly. Most recently, Halcyon Dive Systems was updated on October 21, 2026 and Okeanun on October 16, 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.*