# Nitrox Buddy vs Active Log

The clearest difference is update cadence: Active Log at every 3 days against Nitrox Buddy's every 7 months. Active Log also leads on iOS requirement (15.6 vs 26.0). Nitrox Buddy's advantage is ratings volume (468 vs 1). 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 and Active Log sells 4 in-app purchases, starting at $4.99 per year. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.9 for Nitrox Buddy against 5.0 for Active Log. 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 100% of Active Log's.

Nitrox Buddy ships an update every 7 months, Active Log every 3 days. The most recent releases landed on October 8, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Nitrox Buddy | Active Log |
| --- | --- | --- |
| 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/active-log/id6756741575/reviews)** |
| Number of ratings | **468** | 1 |
| Positive reviews | 95.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 6 MB | 75 MB |
| Requires iOS | 26.0 | **15.6** |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gereon Steffens](https://appshunter.io/developer/493030228) | [Duong Do](https://appshunter.io/developer/1455884076) |

## 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)


### Active Log

[App page](https://appshunter.io/ios/app/active-log/id6756741575)

This app serves as a comprehensive dive logbook for scuba and freediving enthusiasts. It allows users to track progress, plan dives, import data from dive computers and existing files, and store important documents. It also includes safety calculators and works offline.

**Highlights:** Dive computer data import, Log file import (SSRF, .FIT), Dive planning and profile tracking, Document and certification storage, Offline functionality, Safety calculators (MOD, EAD, ppO2), Cloud sync across devices

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Freediving module (yearly) | $4.99 | per year |
| TechDive module (yearly) | $4.99 | per year |
| Swimming module (yearly) | $4.99 | per year |
| Diving module (yearly) | $9.99 | per year |


## Frequently asked questions

### Is Nitrox Buddy free?

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

### Is Active Log free?

Active Log is free to download, with in-app purchases available.

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

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

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

Neither Nitrox Buddy nor Active Log shows ads.

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

Nitrox Buddy ships an update every 7 months, and Active Log every 3 days. Most recently, Nitrox Buddy was updated on October 8, 2026 and Active Log on October 10, 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.*