# Gas*Blender vs Poseidon Reef

The clearest difference is price: Poseidon Reef at Free against Gas*Blender's $2.99. Poseidon Reef also leads on update cadence (every 5 weeks vs every 3 months) and device support (4 vs 2). Gas*Blender's advantage is ads (none vs shown). On in-app purchases there is nothing between them.

Poseidon Reef is free to download; Gas*Blender costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Gas*Blender ships an update every 3 months, Poseidon Reef every 5 weeks. The most recent releases landed on November 10, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Gas*Blender | Poseidon Reef |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/poseidon-reef/id1581432645/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Monetization | — | Ad-supported |
| Size | 4 MB | 58 MB |
| Requires iOS | 26.0 | **12.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Martin Schyth](https://appshunter.io/developer/496853774) | [Poseidon Diving Systems AB](https://appshunter.io/developer/567839779) |

## What reviewers say

### Gas*Blender

[App page](https://appshunter.io/ios/app/gasblender/id496853771)

**Features:** Vision Pro support

**In-app purchases:** none


### Poseidon Reef

[App page](https://appshunter.io/ios/app/poseidon-reef/id1581432645)

This app helps divers log, plan, and analyze their dives. It offers detailed overviews, customizable dive logs, and advanced planning for various dive types. Connect your dive computer to manage data and firmware.

**Highlights:** Comprehensive dive logging, Detailed dive planning, Support for OC and CCR dives, Unlimited tank support, Decompression model selection, Dive computer connectivity, Cloud backup and firmware updates

**In-app purchases:** none


## Frequently asked questions

### Is Gas*Blender free?

Gas*Blender costs $2.99, with no in-app purchases.

### Is Poseidon Reef free?

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

### Do Gas*Blender or Poseidon Reef have ads?

Poseidon Reef shows ads; Gas*Blender does not.

### Which is updated more often, Gas*Blender or Poseidon Reef?

Gas*Blender ships an update every 3 months, and Poseidon Reef every 5 weeks. Most recently, Gas*Blender was updated on November 10, 2026 and Poseidon Reef on November 3, 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.*