# Nitrox Buddy vs iScubaSites

The clearest difference is rating: Nitrox Buddy at 4.9 against iScubaSites's 4.4. Nitrox Buddy also leads on ratings volume (489 vs 8) and review sentiment (96% vs 80%). iScubaSites's advantage is in-app purchases (none vs 1) and update cadence (every 6 weeks vs every 7 months). On price, ads, device support and iOS requirement there is nothing between them.

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

Nitrox Buddy holds the better App Store score, 4.9 against 4.4. That said, the two scores are not equally well evidenced: Nitrox Buddy has 489 ratings behind it against 8, 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 80% of iScubaSites's.

Nitrox Buddy ships an update every 7 months, iScubaSites every 6 weeks. The most recent releases landed on November 1, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Nitrox Buddy | iScubaSites |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (489 ratings)](https://appshunter.io/ios/app/nitrox-buddy/id572411073/reviews)** | [4.4 (8 ratings)](https://appshunter.io/ios/app/iscubasites/id1273730297/reviews) |
| Number of ratings | **489** | 8 |
| Positive reviews | **95.8% of reviews** | 80.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 6 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 6 MB | 3 MB |
| Requires iOS | 26.0 | 26.0 |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Gereon Steffens](https://appshunter.io/developer/493030228) | [Arie Guttman](https://appshunter.io/developer/1029107890) |

## 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)


### iScubaSites

[App page](https://appshunter.io/ios/app/iscubasites/id1273730297)

Discover scuba diving locations globally with this user-friendly app. Simply search a region to find available dive sites and access detailed information when provided. Explore the underwater world with ease.

**Highlights:** Worldwide diving site information, Location-based search, Detailed dive site information, Simple and intuitive interface, Explore underwater locations

**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 iScubaSites free?

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

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

Nitrox Buddy is rated higher. Nitrox Buddy averages 4.9 out of 5 from 489 ratings, while iScubaSites averages 4.4 from 8 ratings.

### Do Nitrox Buddy or iScubaSites have ads?

Neither Nitrox Buddy nor iScubaSites shows ads.

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

Nitrox Buddy ships an update every 7 months, and iScubaSites every 6 weeks. Most recently, Nitrox Buddy was updated on November 1, 2026 and iScubaSites on October 20, 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.*