# Nitrox Tools vs Scuba Tank Capacity

The clearest difference is price: Scuba Tank Capacity at Free against Nitrox Tools's $5.99. Scuba Tank Capacity also leads on iOS requirement (13.0 vs 15.6). Nitrox Tools's advantage is chart position (#115 vs unranked). On update cadence, ads, in-app purchases and device support there is nothing between them.

Scuba Tank Capacity 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 ships an update every 5 months, Scuba Tank Capacity every 7 months. The most recent releases landed on October 21, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Nitrox Tools | Scuba Tank Capacity |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/nitrox-tools/id284919980/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 88.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 7 months |
| Monetization | Paid | — |
| Best chart rank | **#115** | — |
| Size | 7 MB | 34 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Greg Mclaughlin](https://appshunter.io/developer/284919983) | [Anthony Dupre](https://appshunter.io/developer/1874949335) |

## What reviewers say

### Nitrox Tools

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

**Currently charting:** #115 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


### Scuba Tank Capacity

[App page](https://appshunter.io/ios/app/scuba-tank-capacity/id6758780465)

**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 Scuba Tank Capacity free?

Scuba Tank Capacity is free to download, with no in-app purchases.

### Do Nitrox Tools or Scuba Tank Capacity have ads?

Neither Nitrox Tools nor Scuba Tank Capacity shows ads.

### Which is updated more often, Nitrox Tools or Scuba Tank Capacity?

Nitrox Tools ships an update every 5 months, and Scuba Tank Capacity every 7 months. Most recently, Nitrox Tools was updated on October 21, 2026 and Scuba Tank Capacity on October 6, 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.*