# Decosoft vs Dive Shearwater

The clearest difference is review sentiment: Decosoft at 100% against Dive Shearwater's 7%. Dive Shearwater's advantage is in-app purchases (none vs 8). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Decosoft sells 8 in-app purchases, starting at $3.99 per month. Dive Shearwater asks for nothing beyond the download.

Decosoft ships an update every 2 weeks, Dive Shearwater monthly. The most recent releases landed on October 8, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Decosoft | Dive Shearwater |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.5 (45 ratings)](https://appshunter.io/ios/app/dive-shearwater/id6751863035/reviews)** |
| Number of ratings | — | **45** |
| Positive reviews | **100.0% of reviews** | 7.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 47 MB | 103 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Michael Czolko](https://appshunter.io/developer/674555865) | [Shearwater Research](https://appshunter.io/developer/1164234361) |

## What reviewers say

### Decosoft

[App page](https://appshunter.io/ios/app/decosoft/id6453846218)

Plan your dives with this comprehensive tech diving tool. It offers a user-friendly interface, advanced decompression models, and various dive calculators to ensure safe and enjoyable underwater adventures. Save, share, and prepare for every dive with detailed insights.

**Highlights:** User-friendly dive planning interface, Bühlmann decompression model, Detailed runtime table with graphs, Support for OC and CCR, Multiple dive calculators, Save and share dive plans

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Partner | $3.99 | per month |
| Monthly | $3.99 | per month |
| Annual Partners | $39.99 | per year |
| Ultimate | $39.99 | per year |
| Ultimate Offer | $39.99 | per year |
| Ultimate | $20.99 | one-time |
| Ultimate | $23.99 | one-time |
| Ultimate | $29.99 | one-time |


### Dive Shearwater

[App page](https://appshunter.io/ios/app/dive-shearwater/id6751863035)

This app serves as a digital dive log, allowing divers to meticulously record their underwater adventures. It features interactive maps to track explored locations and integrates with specific hardware to automatically capture dive site coordinates. Designed for simplicity and reliability, it helps divers organize records and plan future dives.

**Highlights:** Interactive dive maps, Automatic dive site coordinate capture, Streamlined user experience, Dive history tracking, Gear setup refinement, Dive planning tools

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

**In-app purchases:** none


## Frequently asked questions

### Is Decosoft free?

Decosoft is free to download, with in-app purchases available.

### Is Dive Shearwater free?

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

### Do Decosoft or Dive Shearwater have ads?

Neither Decosoft nor Dive Shearwater shows ads.

### Which is updated more often, Decosoft or Dive Shearwater?

Decosoft ships an update every 2 weeks, and Dive Shearwater monthly. Most recently, Decosoft was updated on October 8, 2026 and Dive Shearwater on October 19, 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.*