# Shearwater Cloud vs Poseidon Reef

The clearest difference is ads: Shearwater Cloud at none against Poseidon Reef's shown. Shearwater Cloud also leads on review sentiment (26% vs 0%) and ratings volume (104 vs 2). Poseidon Reef's advantage is rating (3.0 vs 2.6). 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.

Poseidon Reef holds the better App Store score, 3.0 against 2.6. That said, the two scores are not equally well evidenced: Shearwater Cloud has 104 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 26% of Shearwater Cloud's written reviews are positive against 0% of Poseidon Reef's, so the app with the better star average is not the one people write more warmly about.

Both ship on a similar rhythm, roughly every 5 weeks. The most recent releases landed on October 21, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Shearwater Cloud | Poseidon Reef |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.6 (104 ratings)](https://appshunter.io/ios/app/shearwater-cloud/id1185701505/reviews) | **[3.0 (2 ratings)](https://appshunter.io/ios/app/poseidon-reef/id1581432645/reviews)** |
| Number of ratings | **104** | 2 |
| Positive reviews | **25.8% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | Every 5 weeks |
| Monetization | **Free** | Ad-supported |
| Size | 333 MB | 58 MB |
| Requires iOS | 13.0 | **12.1** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Shearwater Research](https://appshunter.io/developer/1164234361) | [Poseidon Diving Systems AB](https://appshunter.io/developer/567839779) |

## What reviewers say

### Shearwater Cloud

[App page](https://appshunter.io/ios/app/shearwater-cloud/id1185701505)

Connect your mobile device to your dive computer to download, manage, and analyze dive logs. Update firmware and utilize cloud storage for accessible and secure dive data across multiple devices.

**Highlights:** Download dive logs via Bluetooth LE, Analyze depth, decompression, and temperature, Cloud storage for dive logs, Firmware updates for dive computers, Cross-device accessibility

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🔄 Reliable dive data synchronization with computers
- ☁️ Cloud storage functionality for accessing dives across devices
- 📊 Clear display of dive statistics and information
- 🔌 Easy Bluetooth connectivity (when working)
- ⚡ Functional core logging features

**What reviewers complain about**

- 🎨 Outdated, unattractive user interface design
- 📱 Poor iPad optimization and landscape mode issues
- 🐢 Extremely slow performance and lag
- 🔗 Frequent Bluetooth connectivity failures
- 💥 App crashes on launch and during use

**Reported bugs**

- App crashes on startup with latest iOS versions
- Bluetooth connection causes app to freeze or crash
- Dives fail to download or sync completely
- Dive numbers display incorrectly compared to computer
- Data loss when updating app or firmware

**Requested features**

- Modern, native-looking user interface redesign
- GPS/geolocation integration for dive sites
- Ability to manually add or import dives
- Photo attachment capability for dives
- Dive planner functionality


### 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 Shearwater Cloud free?

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

### Is Poseidon Reef free?

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

### Which has better reviews, Shearwater Cloud or Poseidon Reef?

Poseidon Reef is rated higher. Shearwater Cloud averages 2.6 out of 5 from 104 ratings, while Poseidon Reef averages 3.0 from 2 ratings.

### Do Shearwater Cloud or Poseidon Reef have ads?

Poseidon Reef shows ads; Shearwater Cloud does not.

### Which is updated more often, Shearwater Cloud or Poseidon Reef?

Shearwater Cloud ships an update every 5 weeks, and Poseidon Reef every 5 weeks. Most recently, Shearwater Cloud was updated on October 21, 2026 and Poseidon Reef 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.*