# Decosoft vs Scuba Obsession Dive Log

The clearest difference is in-app purchases: Scuba Obsession Dive Log at none against Decosoft's 8. Scuba Obsession Dive Log also leads on update cadence (every 3 days vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

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

Decosoft ships an update every 2 weeks, Scuba Obsession Dive Log every 3 days. The most recent releases landed on October 8, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Decosoft | Scuba Obsession Dive Log |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 47 MB | 61 MB |
| Requires iOS | 16.4 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Michael Czolko](https://appshunter.io/developer/674555865) | [Christian Jones](https://appshunter.io/developer/1791755334) |

## 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 |


### Scuba Obsession Dive Log

[App page](https://appshunter.io/ios/app/scuba-obsession-dive-log/id6740821537)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Decosoft free?

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

### Is Scuba Obsession Dive Log free?

Scuba Obsession Dive Log is free to download, with no in-app purchases.

### Do Decosoft or Scuba Obsession Dive Log have ads?

Neither Decosoft nor Scuba Obsession Dive Log shows ads.

### Which is updated more often, Decosoft or Scuba Obsession Dive Log?

Decosoft ships an update every 2 weeks, and Scuba Obsession Dive Log every 3 days. Most recently, Decosoft was updated on October 8, 2026 and Scuba Obsession Dive Log on October 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.*