# Nitrox Buddy vs Deepblu

The clearest difference is review sentiment: Nitrox Buddy at 96% against Deepblu's 36%. Nitrox Buddy also leads on rating (4.9 vs 2.9) and ratings volume (468 vs 39). Deepblu's advantage is in-app purchases (none vs 1) and update cadence (monthly vs every 7 months). On price, ads and device support there is nothing between them.

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

Nitrox Buddy holds the better App Store score, 4.9 against 2.9. That said, the two scores are not equally well evidenced: Nitrox Buddy has 468 ratings behind it against 39, 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 36% of Deepblu's.

Nitrox Buddy ships an update every 7 months, Deepblu monthly. The most recent releases landed on September 25, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Nitrox Buddy | Deepblu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (468 ratings)](https://appshunter.io/ios/app/nitrox-buddy/id572411073/reviews)** | [2.9 (39 ratings)](https://appshunter.io/ios/app/deepblu-enhance-your-dive/id1093357370/reviews) |
| Number of ratings | **468** | 39 |
| Positive reviews | **95.7% of reviews** | 36.4% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Monthly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 6 MB | 88 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gereon Steffens](https://appshunter.io/developer/493030228) | [Blaris ApS](https://appshunter.io/developer/1870014114) |

## 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)


### Deepblu

[App page](https://appshunter.io/ios/app/deepblu-enhance-your-dive/id1093357370)

Log your underwater adventures, enrich them with media, and connect with a global diving community. Automatically sync dive data from compatible computers and discover popular dive destinations worldwide. Build your diver profile and get your logs certified by instructors.

**Highlights:** Automatic dive log synchronization, Add photos and videos to logs, Discover and plan dive destinations, Build diver identity and profile, Instructor certification of logs, Compatible with many dive computers

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Nitrox Buddy free?

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

### Is Deepblu free?

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

### Which has better reviews, Nitrox Buddy or Deepblu?

Nitrox Buddy is rated higher. Nitrox Buddy averages 4.9 out of 5 from 468 ratings, while Deepblu averages 2.9 from 39 ratings.

### Do Nitrox Buddy or Deepblu have ads?

Neither Nitrox Buddy nor Deepblu shows ads.

### Which is updated more often, Nitrox Buddy or Deepblu?

Nitrox Buddy ships an update every 7 months, and Deepblu monthly. Most recently, Nitrox Buddy was updated on September 25, 2026 and Deepblu on September 27, 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.*