# Nitrox Tools vs Thalos

The clearest difference is price: Thalos at Free against Nitrox Tools's $5.99. Thalos also leads on update cadence (daily vs every 5 months). Nitrox Tools's advantage is in-app purchases (none vs 2) and device support (4 vs 2). On rating, ratings volume, ads and iOS requirement there is nothing between them.

Thalos is free to download; Nitrox Tools costs $5.99 up front. Thalos sells 2 in-app purchases, starting at $2.99 per month. Nitrox Tools asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Nitrox Tools against 5.0 for Thalos. Both are backed by a comparable volume of ratings — 4 and 2 respectively.

Nitrox Tools ships an update every 5 months, Thalos daily. Both last shipped on October 13, 2026.

## The numbers

| Metric | Nitrox Tools | Thalos |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Rating | [5.0 (4 ratings)](https://appshunter.io/ios/app/nitrox-tools/id284919980/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/thalos/id6761337227/reviews) |
| Number of ratings | **4** | 2 |
| Positive reviews | 88.5% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Daily** |
| Monetization | **Paid** | Subscription |
| Size | 7 MB | 41 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Greg Mclaughlin](https://appshunter.io/developer/284919983) | [JOHN WALLIS YOUNGBLOOD](https://appshunter.io/developer/1888980268) |

## What reviewers say

### Nitrox Tools

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

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


### Thalos

[App page](https://appshunter.io/ios/app/thalos/id6761337227)

This comprehensive dive app offers a robust dive logbook, detailed dive site information with emergency plans, and multiple dive calculators. It includes features for instructors to manage students and courses, and a social feed for divers to connect and share experiences. The app works fully offline, ensuring critical data is always accessible.

**Highlights:** Offline dive logbook, Dive site database with emergency plans, 9 essential dive calculators, Instructor module for course management, Social feed and community features, Emergency mode for critical access

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Thalos | $2.99 | per month |
| Thalos | $19.99 | per year |


## Frequently asked questions

### Is Nitrox Tools free?

Nitrox Tools costs $5.99, with no in-app purchases.

### Is Thalos free?

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

### Which has better reviews, Nitrox Tools or Thalos?

Nitrox Tools and Thalos are both rated 5.0 out of 5 on the App Store, from 4 and 2 ratings respectively.

### Do Nitrox Tools or Thalos have ads?

Neither Nitrox Tools nor Thalos shows ads.

### Which is updated more often, Nitrox Tools or Thalos?

Nitrox Tools ships an update every 5 months, and Thalos daily. Most recently, Nitrox Tools was updated on October 13, 2026 and Thalos on October 13, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*