# Nitrox Virtual Analyzer vs Erebus Scuba Dive Log & Deco

The clearest difference is in-app purchases: Nitrox Virtual Analyzer at none against Erebus Scuba Dive Log & Deco's 2. Nitrox Virtual Analyzer also leads on iOS requirement (13.0 vs 15.1). Erebus Scuba Dive Log & Deco's advantage is update cadence (monthly vs every 24 months). On price, ads and device support there is nothing between them.

Both are free to download. Erebus Scuba Dive Log & Deco sells 2 in-app purchases, starting at $6.99 per month. Nitrox Virtual Analyzer asks for nothing beyond the download.

Nitrox Virtual Analyzer ships an update every 24 months, Erebus Scuba Dive Log & Deco monthly. The most recent releases landed on October 12, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Nitrox Virtual Analyzer | Erebus Scuba Dive Log & Deco |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.5 (2 ratings)](https://appshunter.io/ios/app/erebus-scuba-dive-log-and-deco/id6780519891/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 24 months | **Monthly** |
| Monetization | — | Freemium |
| Size | 6 MB | 54 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [James Costello](https://appshunter.io/developer/1504868572) | [Leviathan Systems Ltd](https://appshunter.io/developer/1895611456) |

## What reviewers say

### Nitrox Virtual Analyzer

[App page](https://appshunter.io/ios/app/nitrox-virtual-analyzer/id1505174941)

**Features:** macOS Compatibility

**In-app purchases:** none


### Erebus Scuba Dive Log & Deco

[App page](https://appshunter.io/ios/app/erebus-scuba-dive-log-and-deco/id6780519891)

This app is a comprehensive dive management tool for recreational and technical divers. It allows for detailed dive logging, planning, gear management, and certification tracking. The app is always offline-capable, ensuring data accessibility in remote locations.

**Highlights:** Dive logging with profile charts, Decompression planning (Bühlmann ZHL-16C), Gear inventory management, Cylinder certification tracking, Dive site library with Wikipedia integration, Underwater photo & video organization, Certification and dive trip planning

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $6.99 | per month |
| Annual | $69.99 | per year |


## Frequently asked questions

### Is Nitrox Virtual Analyzer free?

Nitrox Virtual Analyzer is free to download, with no in-app purchases.

### Is Erebus Scuba Dive Log & Deco free?

Erebus Scuba Dive Log & Deco is free to download, with in-app purchases available.

### Do Nitrox Virtual Analyzer or Erebus Scuba Dive Log & Deco have ads?

Neither Nitrox Virtual Analyzer nor Erebus Scuba Dive Log & Deco shows ads.

### Which is updated more often, Nitrox Virtual Analyzer or Erebus Scuba Dive Log & Deco?

Nitrox Virtual Analyzer ships an update every 24 months, and Erebus Scuba Dive Log & Deco monthly. Most recently, Nitrox Virtual Analyzer was updated on October 12, 2026 and Erebus Scuba Dive Log & Deco on October 28, 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.*