# Nitrox Tools vs Erebus Scuba Dive Log & Deco

The clearest difference is review sentiment: Nitrox Tools at 88% against Erebus Scuba Dive Log & Deco's 0%. Nitrox Tools also leads on rating (5.0 vs 1.5) and in-app purchases (none vs 2). Erebus Scuba Dive Log & Deco's advantage is price (Free vs $5.99) and update cadence (monthly vs every 4 months). On ratings volume, ads, device support and iOS requirement there is nothing between them.

Erebus Scuba Dive Log & Deco is free to download; Nitrox Tools costs $5.99 up front. Erebus Scuba Dive Log & Deco sells 2 in-app purchases, starting at $6.99 per month. Nitrox Tools asks for nothing beyond the download.

Nitrox Tools holds the better App Store score, 5.0 against 1.5. Both are backed by a comparable volume of ratings — 4 and 2 respectively. Written reviews point the same way: 88% of Nitrox Tools's written reviews are positive against 0% of Erebus Scuba Dive Log & Deco's.

Nitrox Tools ships an update every 4 months, Erebus Scuba Dive Log & Deco monthly. The most recent releases landed on October 27, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Nitrox Tools | Erebus Scuba Dive Log & Deco |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/nitrox-tools/id284919980/reviews)** | [1.5 (2 ratings)](https://appshunter.io/ios/app/erebus-scuba-dive-log-and-deco/id6780519891/reviews) |
| Number of ratings | **4** | 2 |
| Positive reviews | **88.5% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | Paid | **Freemium** |
| Best chart rank | **#168** | — |
| Size | 7 MB | 54 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Greg Mclaughlin](https://appshunter.io/developer/284919983) | [Leviathan Systems Ltd](https://appshunter.io/developer/1895611456) |

## What reviewers say

### Nitrox Tools

[App page](https://appshunter.io/ios/app/nitrox-tools/id284919980)

**Currently charting:** #168 Top Paid · Sports (US App Store)

This app provides essential tools for divers to plan and blend enriched air nitrox. It calculates dive parameters like equivalent air depth and maximum operating depth, and supports various blending methods for custom gas mixes. Easily switch between metric and imperial units and save custom settings for frequent use.

**Highlights:** Enriched air nitrox blending, Dive planning calculations, Equivalent Air Depth (EAD), Partial Pressure of Oxygen (PPO2), Maximum Operating Depth (MOD), Save custom mixes and settings, Metric/Imperial unit switching

**Features:** Vision Pro support

**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 Tools free?

Nitrox Tools costs $5.99, 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.

### Which has better reviews, Nitrox Tools or Erebus Scuba Dive Log & Deco?

Nitrox Tools is rated higher. Nitrox Tools averages 5.0 out of 5 from 4 ratings, while Erebus Scuba Dive Log & Deco averages 1.5 from 2 ratings.

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

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

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

Nitrox Tools ships an update every 4 months, and Erebus Scuba Dive Log & Deco monthly. Most recently, Nitrox Tools was updated on October 27, 2026 and Erebus Scuba Dive Log & Deco on October 21, 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.*