# DecoPlanner mobile vs Poseidon Reef

The clearest difference is review sentiment: DecoPlanner mobile at 40% against Poseidon Reef's 0%. DecoPlanner mobile also leads on ads (none vs shown) and monetization model (free vs ad-supported). 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.

DecoPlanner mobile ships an update every 2 months, Poseidon Reef every 5 weeks. The most recent releases landed on September 25, 2026 and June 2, 2026 respectively.

## The numbers

| Metric | DecoPlanner mobile | Poseidon Reef |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/poseidon-reef/id1581432645/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | **40.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | **Free** | Ad-supported |
| Size | 74 MB | 58 MB |
| Requires iOS | 13.0 | **12.1** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Global Underwater Explorers Inc.](https://appshunter.io/developer/1459213336) | [Poseidon Diving Systems AB](https://appshunter.io/developer/567839779) |

## What reviewers say

### DecoPlanner mobile

[App page](https://appshunter.io/ios/app/decoplanner-mobile/id1580563324)

Plan complex dive profiles using advanced decompression models. Track multiple gases, manage dive buddies, and visualize dive data with detailed graphs. Choose the version that suits your diving certification level.

**Highlights:** Open/Closed/Passive Semi-Closed Circuit planning, ZH-L16 / VPM-B decompression models, Gas tracking for multiple gases and dive buddies, Gas mixing (partial pressure & continuous blending), Dive profile and tissue compartment graphs, Diving level selection (Rec 1 to Unlimited CCR)

**Features:** macOS Compatibility

**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 DecoPlanner mobile free?

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

### Is Poseidon Reef free?

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

### Do DecoPlanner mobile or Poseidon Reef have ads?

Poseidon Reef shows ads; DecoPlanner mobile does not.

### Which is updated more often, DecoPlanner mobile or Poseidon Reef?

DecoPlanner mobile ships an update every 2 months, and Poseidon Reef every 5 weeks. Most recently, DecoPlanner mobile was updated on September 25, 2026 and Poseidon Reef on June 2, 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.*