# Halcyon Dive Systems vs Boulder Block App

The clearest difference is rating: Halcyon Dive Systems at 5.0 against Boulder Block App's 1.0. Halcyon Dive Systems also leads on update cadence (every 2 weeks vs every 3 months) and ratings volume (8 vs 1). Boulder Block App's advantage is monetization model (free vs ad-supported). On price, ads, 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 holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: Halcyon Dive Systems has 8 ratings behind it against 1, so its average is the more settled of the two.

Halcyon Dive Systems ships an update every 2 weeks, Boulder Block App every 3 months. The most recent releases landed on October 4, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Halcyon Dive Systems | Boulder Block App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (8 ratings)](https://appshunter.io/ios/app/halcyon-dive-systems-diving/id6738069654/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/boulder-block-app/id6761733626/reviews) |
| Number of ratings | **8** | 1 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 months |
| Monetization | Ad-supported | **Free** |
| Size | 159 MB | 29 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Halcyon Dive Systems](https://appshunter.io/developer/1779189368) | [Matthew Canoy](https://appshunter.io/developer/1705633335) |

## 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


### Boulder Block App

[App page](https://appshunter.io/ios/app/boulder-block-app/id6761733626)

This app is a companion for a physical climbing product, offering tutorials, digital versions of challenge decks, and tools to create and share your own climbing routes. Connect with a global community of climbers, track your progress, and discover new challenges.

**Highlights:** Climbing route tutorials, Digital challenge decks, Interactive route builder, Community route sharing, Progress tracking, Video send uploads

**Features:** macOS Compatibility, 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 Boulder Block App free?

Boulder Block App is free to download, with no in-app purchases.

### Which has better reviews, Halcyon Dive Systems or Boulder Block App?

Halcyon Dive Systems is rated higher. Halcyon Dive Systems averages 5.0 out of 5 from 8 ratings, while Boulder Block App averages 1.0 from 1 ratings.

### Do Halcyon Dive Systems or Boulder Block App have ads?

Neither Halcyon Dive Systems nor Boulder Block App shows ads.

### Which is updated more often, Halcyon Dive Systems or Boulder Block App?

Halcyon Dive Systems ships an update every 2 weeks, and Boulder Block App every 3 months. Most recently, Halcyon Dive Systems was updated on October 4, 2026 and Boulder Block App on October 17, 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.*