# Nitrox Buddy vs DeeperBlue.com

The clearest difference is in-app purchases: DeeperBlue.com at none against Nitrox Buddy's 1. DeeperBlue.com also leads on update cadence (every 3 months vs every 7 months) and iOS requirement (11.0 vs 26.0). Nitrox Buddy's advantage is ratings volume (468 vs 61). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. Nitrox Buddy sells 1 one-off in-app purchase. DeeperBlue.com asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for Nitrox Buddy against 4.8 for DeeperBlue.com. That said, the two scores are not equally well evidenced: Nitrox Buddy has 468 ratings behind it against 61, so its average is the more settled of the two. Written reviews are what separate them: 96% of Nitrox Buddy's written reviews are positive against 100% of DeeperBlue.com's.

Nitrox Buddy ships an update every 7 months, DeeperBlue.com every 3 months. The most recent releases landed on September 25, 2026 and September 5, 2026 respectively.

## The numbers

| Metric | Nitrox Buddy | DeeperBlue.com |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (468 ratings)](https://appshunter.io/ios/app/nitrox-buddy/id572411073/reviews)** | [4.8 (61 ratings)](https://appshunter.io/ios/app/deeperbluecom/id894987002/reviews) |
| Number of ratings | **468** | 61 |
| Positive reviews | 95.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 6 MB | 34 MB |
| Requires iOS | 26.0 | **11.0** |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Gereon Steffens](https://appshunter.io/developer/493030228) | [DeeperBlue.com](https://appshunter.io/developer/1345475661) |

## 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

**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)


### DeeperBlue.com

[App page](https://appshunter.io/ios/app/deeperbluecom/id894987002)

Stay informed about freediving, scuba diving, ocean advocacy, and diving travel with daily news, in-depth articles, and unbiased reviews. Access ultimate guides, watch videos, and engage with a passionate community.

**Highlights:** Daily diving journalism, Live news notifications, In-depth feature articles, Ultimate diving guides, Video of the Week, Community comments and sharing, Searchable archives

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Nitrox Buddy free?

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

### Is DeeperBlue.com free?

DeeperBlue.com is free to download, with no in-app purchases.

### Which has better reviews, Nitrox Buddy or DeeperBlue.com?

Nitrox Buddy is rated higher. Nitrox Buddy averages 4.9 out of 5 from 468 ratings, while DeeperBlue.com averages 4.8 from 61 ratings.

### Do Nitrox Buddy or DeeperBlue.com have ads?

Neither Nitrox Buddy nor DeeperBlue.com shows ads.

### Which is updated more often, Nitrox Buddy or DeeperBlue.com?

Nitrox Buddy ships an update every 7 months, and DeeperBlue.com every 3 months. Most recently, Nitrox Buddy was updated on September 25, 2026 and DeeperBlue.com on September 5, 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.*