# Nitrox Virtual Analyzer vs Reef

The clearest difference is in-app purchases: Nitrox Virtual Analyzer at none against Reef's 2. Nitrox Virtual Analyzer also leads on iOS requirement (13.0 vs 15.1). Reef's advantage is update cadence (every 6 days vs every 24 months). On price, ads and device support there is nothing between them.

Both are free to download. Reef sells 2 in-app purchases, starting at $4.99 per month. Nitrox Virtual Analyzer asks for nothing beyond the download.

Nitrox Virtual Analyzer ships an update every 24 months, Reef every 6 days. The most recent releases landed on October 12, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Nitrox Virtual Analyzer | Reef |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 6 days** |
| Size | 6 MB | 174 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) | [Anton Usov](https://appshunter.io/developer/1887388788) |

## What reviewers say

### Nitrox Virtual Analyzer

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Reef

[App page](https://appshunter.io/ios/app/reef-scuba-diving-logbook/id6761029175)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Reef Pro - Monthly | $4.99 | per month |
| Reef Pro - Yearly | $29.99 | per year |


## Frequently asked questions

### Is Nitrox Virtual Analyzer free?

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

### Is Reef free?

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

### Do Nitrox Virtual Analyzer or Reef have ads?

Neither Nitrox Virtual Analyzer nor Reef shows ads.

### Which is updated more often, Nitrox Virtual Analyzer or Reef?

Nitrox Virtual Analyzer ships an update every 24 months, and Reef every 6 days. Most recently, Nitrox Virtual Analyzer was updated on October 12, 2026 and Reef on October 15, 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.*