# Nitrox Buddy vs divelogs

The clearest difference is in-app purchases: divelogs at none against Nitrox Buddy's 1. divelogs also leads on update cadence (monthly vs every 7 months) and iOS requirement (17.5 vs 26.0). Nitrox Buddy's advantage is review sentiment (96% vs 67%) and ratings volume (468 vs 1). On price, rating, ads and device support there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.9 for Nitrox Buddy against 5.0 for divelogs. That said, the two scores are not equally well evidenced: Nitrox Buddy has 468 ratings behind it against 1, 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 67% of divelogs's.

Nitrox Buddy ships an update every 7 months, divelogs monthly. The most recent releases landed on September 25, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Nitrox Buddy | divelogs |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (468 ratings)](https://appshunter.io/ios/app/nitrox-buddy/id572411073/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/divelogs/id6475862147/reviews)** |
| Number of ratings | **468** | 1 |
| Positive reviews | **95.7% of reviews** | 66.7% 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 | 35 MB |
| Requires iOS | 26.0 | **17.5** |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Gereon Steffens](https://appshunter.io/developer/493030228) | [Rainer Mohr](https://appshunter.io/developer/1725310790) |

## 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)


### divelogs

[App page](https://appshunter.io/ios/app/divelogs/id6475862147)

Manage your diving activities and certifications with this companion app. Add, edit, and sync your dive logs, gear, and certifications with the web platform. Supports importing dive data from FIT files.

**Highlights:** Sync dive logs with web platform, Add and edit dives, Manage certifications, Track dive gear, Import FIT files

**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 divelogs free?

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

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

divelogs is rated higher. Nitrox Buddy averages 4.9 out of 5 from 468 ratings, while divelogs averages 5.0 from 1 ratings.

### Do Nitrox Buddy or divelogs have ads?

Neither Nitrox Buddy nor divelogs shows ads.

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

Nitrox Buddy ships an update every 7 months, and divelogs monthly. Most recently, Nitrox Buddy was updated on September 25, 2026 and divelogs on September 9, 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.*