# Nitrox by Envivia vs AED Training Box

The clearest difference is rating: Nitrox by Envivia at 5.0 against AED Training Box's 1.0. Nitrox by Envivia also leads on update cadence (every 6 weeks vs every 15 months). AED Training Box's advantage is in-app purchases (none vs 4) and iOS requirement (11.0 vs 15.6). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Nitrox by Envivia sells 4 in-app purchases, starting at $9.99 per year. AED Training Box asks for nothing beyond the download.

Nitrox by Envivia holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Nitrox by Envivia ships an update every 6 weeks, AED Training Box every 15 months. The most recent releases landed on August 29, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Nitrox by Envivia | AED Training Box |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/nitrox-by-envivia/id1613770132/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/aed-training-box/id1669054200/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 15 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 72 MB | 108 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [ENVIVIA](https://appshunter.io/developer/1583628615) | [Ricardo Ahumada](https://appshunter.io/developer/1555700427) |

## What reviewers say

### Nitrox by Envivia

[App page](https://appshunter.io/ios/app/nitrox-by-envivia/id1613770132)

This app is a premium digital guide for Nitrox diving, offering educational content and calculation tools to optimize dives. It helps divers understand oxygen limits, plan dives using gradient factors, and prepare for certification.

**Highlights:** Calculate MOD (Maximum Operating Depth), Manage oxygen partial pressure (PPO₂), Optimize Nitrox dive planning, Understand oxygen-related physiological limits, Prepare for Nitrox certification, Multilingual support

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $9.99 | per year |
| Thank you | $1.99 | one-time |
| Popular | $9.99 | one-time |
| Generous | $49.99 | one-time |


### AED Training Box

[App page](https://appshunter.io/ios/app/aed-training-box/id1669054200)

This application provides a simulator for learning how to use an automated external defibrillator (AED) in various emergency scenarios. Trainers can utilize pre-set scenarios to guide students through the process, enhancing practical knowledge.

**Highlights:** AED defibrillator training, Scenario-based learning, Student simulator, Trainer tools, Emergency preparedness

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Nitrox by Envivia free?

Nitrox by Envivia is free to download, with in-app purchases available.

### Is AED Training Box free?

AED Training Box is free to download, with no in-app purchases.

### Which has better reviews, Nitrox by Envivia or AED Training Box?

Nitrox by Envivia is rated higher. Nitrox by Envivia averages 5.0 out of 5 from 1 ratings, while AED Training Box averages 1.0 from 1 ratings.

### Do Nitrox by Envivia or AED Training Box have ads?

Neither Nitrox by Envivia nor AED Training Box shows ads.

### Which is updated more often, Nitrox by Envivia or AED Training Box?

Nitrox by Envivia ships an update every 6 weeks, and AED Training Box every 15 months. Most recently, Nitrox by Envivia was updated on August 29, 2026 and AED Training Box on September 10, 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.*