# Nitrox Buddy vs Asian Diver

The clearest difference is review sentiment: Nitrox Buddy at 96% against Asian Diver's 0%. Nitrox Buddy also leads on rating (4.9 vs 4.0) and monetization model (free with in-app purchases vs subscription). Asian Diver's advantage is iOS requirement (11.0 vs 26.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Nitrox Buddy sells 1 one-off in-app purchase and Asian Diver sells 11 in-app purchases, starting at $4.99 per year. Whichever you choose, the download price is not the number that matters.

Nitrox Buddy holds the better App Store score, 4.9 against 4.0. That said, the two scores are not equally well evidenced: Nitrox Buddy has 490 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 96% of Nitrox Buddy's written reviews are positive against 0% of Asian Diver's.

Nitrox Buddy ships an update every 7 months, Asian Diver every 8 months. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Nitrox Buddy | Asian Diver |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (490 ratings)](https://appshunter.io/ios/app/nitrox-buddy/id572411073/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/asian-diver/id619155005/reviews) |
| Number of ratings | **490** | 1 |
| Positive reviews | **95.8% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 8 months |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 6 MB | 32 MB |
| Requires iOS | 26.0 | **11.0** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Gereon Steffens](https://appshunter.io/developer/493030228) | [Magzter Inc.](https://appshunter.io/developer/406791755) |

## What reviewers say

### Nitrox Buddy

[App page](https://appshunter.io/ios/app/nitrox-buddy/id572411073)

This application serves as a straightforward calculator for nitrox and enriched air divers. It quickly computes essential dive data such as Maximum Operating Depth (MOD), Equivalent Air Depth (EAD), Best Mix, and Partial Pressure of Oxygen (PPO2). It supports both imperial and metric units and offers a companion watch app for on-the-go calculations.

**Highlights:** Calculate MOD, EAD, Best Mix, PPO2, Imperial and metric unit support, Sea and fresh water options, Selectable max oxygen content, Selectable max partial pressure, Companion watch app

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tip | $0.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Quick calculations
- ✅ Accurate results
- 💡 Free to use
- 🎯 Essential for Nitrox divers

**What reviewers complain about**

- 📱 Ugly iPad icon
- ⚠️ MOD calculation limited to 40% O2 in older versions
- ⚠️ MOD calculation limited to 50% O2 in older versions
- ⚠️ Needs to work with older iOS versions

**Reported bugs**

- iPad icon is ugly
- MOD limit of 50% O2 despite 100% O2 setting (resolved)
- MOD limit of 40% O2 (older version)
- Does not work with older iOS versions

**Requested features**

- Add MOD 1.5 option
- Allow MOD calculation up to 100% O2 and indicate max exposure duration
- Change color for inappropriate mixes (e.g., 50% at 40m)
- Support older iOS versions (5 & 6)


### Asian Diver

[App page](https://appshunter.io/ios/app/asian-diver/id619155005)

This app offers in-depth articles and features for diving enthusiasts, covering ocean preservation, safety, and marine life. It provides profiles of industry leaders and guides for certified divers.

**Highlights:** Articles by underwater journalists, Focus on ocean appreciation and preservation, Diving safety information, Profiles of industry leaders, Guides for certified divers, Content for novice and experienced divers

**Features:** macOS Compatibility

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Asian Diver | $4.99 | per year |
| Asian Diver | $1.99 | one-time |
| Issue 4 2018 | $1.99 | one-time |
| Asian Diver Issue 2 - 2013 | $2.99 | one-time |
| Asian Diver  - Issue 03 2013 | $2.99 | one-time |
| Asian Diver - Issue 01 2014 | $2.99 | one-time |
| Asian Diver - Issue 03 2014 | $2.99 | one-time |
| Asian Diver Issue 04 2014 | $2.99 | one-time |
| Asian Diver Issue 06, 2014 | $2.99 | one-time |
| Asian Diver Issue 01, 2015 | $2.99 | one-time |
| Asian Diver Issue 01 2016 | $2.99 | one-time |


## Frequently asked questions

### Is Nitrox Buddy free?

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

### Is Asian Diver free?

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

### Which has better reviews, Nitrox Buddy or Asian Diver?

Nitrox Buddy is rated higher. Nitrox Buddy averages 4.9 out of 5 from 490 ratings, while Asian Diver averages 4.0 from 1 ratings.

### Do Nitrox Buddy or Asian Diver have ads?

Neither Nitrox Buddy nor Asian Diver shows ads.

### Which is updated more often, Nitrox Buddy or Asian Diver?

Nitrox Buddy ships an update every 7 months, and Asian Diver every 8 months. Most recently, Nitrox Buddy was updated on October 24, 2026 and Asian Diver on October 23, 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.*