# Nitrox Tools vs Dive Shearwater

The clearest difference is review sentiment: Nitrox Tools at 88% against Dive Shearwater's 8%. Nitrox Tools also leads on rating (5.0 vs 1.5) and device support (4 vs 2). Dive Shearwater's advantage is price (Free vs $5.99) and update cadence (monthly vs every 5 months). On ads, in-app purchases and iOS requirement there is nothing between them.

Dive Shearwater is free to download; Nitrox Tools costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Nitrox Tools holds the better App Store score, 5.0 against 1.5. That said, the two scores are not equally well evidenced: Dive Shearwater has 45 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 88% of Nitrox Tools's written reviews are positive against 8% of Dive Shearwater's.

Nitrox Tools ships an update every 5 months, Dive Shearwater monthly. The most recent releases landed on September 28, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Nitrox Tools | Dive Shearwater |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/nitrox-tools/id284919980/reviews)** | [1.5 (45 ratings)](https://appshunter.io/ios/app/dive-shearwater/id6751863035/reviews) |
| Number of ratings | 4 | **45** |
| Positive reviews | **88.5% of reviews** | 8.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Paid | **Free** |
| Size | 7 MB | 103 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Greg Mclaughlin](https://appshunter.io/developer/284919983) | [Shearwater Research](https://appshunter.io/developer/1164234361) |

## 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


### 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 Nitrox Tools free?

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

### Is Dive Shearwater free?

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

### Which has better reviews, Nitrox Tools or Dive Shearwater?

Nitrox Tools is rated higher. Nitrox Tools averages 5.0 out of 5 from 4 ratings, while Dive Shearwater averages 1.5 from 45 ratings.

### Do Nitrox Tools or Dive Shearwater have ads?

Neither Nitrox Tools nor Dive Shearwater shows ads.

### Which is updated more often, Nitrox Tools or Dive Shearwater?

Nitrox Tools ships an update every 5 months, and Dive Shearwater monthly. Most recently, Nitrox Tools was updated on September 28, 2026 and Dive Shearwater on September 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.*