# Nitrox Buddy vs Diving Log

The clearest difference is review sentiment: Nitrox Buddy at 96% against Diving Log's 50%. Nitrox Buddy also leads on rating (4.9 vs 1.8) and ratings volume (489 vs 4). Diving Log's advantage is in-app purchases (none vs 1) and iOS requirement (18.0 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

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

Nitrox Buddy holds the better App Store score, 4.9 against 1.8. That said, the two scores are not equally well evidenced: Nitrox Buddy has 489 ratings behind it against 4, 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 50% of Diving Log's.

Nitrox Buddy ships an update every 7 months, Diving Log every 9 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Nitrox Buddy | Diving Log |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (489 ratings)](https://appshunter.io/ios/app/nitrox-buddy/id572411073/reviews)** | [1.8 (4 ratings)](https://appshunter.io/ios/app/diving-log/id1091064630/reviews) |
| Number of ratings | **489** | 4 |
| Positive reviews | **95.8% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 9 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 6 MB | 22 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Gereon Steffens](https://appshunter.io/developer/493030228) | [TABATA CO.,LTD.](https://appshunter.io/developer/1091064629) |

## 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)


### Diving Log

[App page](https://appshunter.io/ios/app/diving-log/id1091064630)

This app serves as a customizable digital logbook for scuba divers. It allows users to record detailed dive information, including depth, time, location, and environmental conditions. Users can also add photos, instructor signatures, and export logs for social sharing.

**Highlights:** Customizable dive logbook, Record dive details (depth, time, temp), Map dive point locations, Add photos and instructor signatures, Export logs to social media, Graph display of depth intervals

**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 Diving Log free?

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

### Which has better reviews, Nitrox Buddy or Diving Log?

Nitrox Buddy is rated higher. Nitrox Buddy averages 4.9 out of 5 from 489 ratings, while Diving Log averages 1.8 from 4 ratings.

### Do Nitrox Buddy or Diving Log have ads?

Neither Nitrox Buddy nor Diving Log shows ads.

### Which is updated more often, Nitrox Buddy or Diving Log?

Nitrox Buddy ships an update every 7 months, and Diving Log every 9 months. Most recently, Nitrox Buddy was updated on November 1, 2026 and Diving Log on November 2, 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.*