# Nitrox Buddy vs Tech Dive

The clearest difference is update cadence: Tech Dive at every 4 weeks against Nitrox Buddy's every 7 months. Tech Dive also leads on iOS requirement (17.0 vs 26.0). Nitrox Buddy's advantage is ratings volume (468 vs 2). 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 Tech Dive sells 2 in-app purchases, starting at $0.99 per month. 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 Tech Dive. That said, the two scores are not equally well evidenced: Nitrox Buddy has 468 ratings behind it against 2, 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 Tech Dive's.

Nitrox Buddy ships an update every 7 months, Tech Dive every 4 weeks. The most recent releases landed on September 21, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Nitrox Buddy | Tech Dive |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (468 ratings)](https://appshunter.io/ios/app/nitrox-buddy/id572411073/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/tech-dive/id6483004689/reviews)** |
| Number of ratings | **468** | 2 |
| Positive reviews | 95.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 4 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 6 MB | 16 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Gereon Steffens](https://appshunter.io/developer/493030228) | [Skytip LLC](https://appshunter.io/developer/1569880600) |

## 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)


### Tech Dive

[App page](https://appshunter.io/ios/app/tech-dive/id6483004689)

This app helps plan scuba dives with various calculators for gas, depth, and air consumption. It supports metric and imperial units and offers advanced features through an in-app purchase.

**Highlights:** Dive planning calculators, Gas and air consumption calculations, Metric and imperial unit support, Depth and EAD calculations, Enriched Air-Nitrox mix calculation, Unit conversion tools

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus Monthly | $0.99 | per month |
| Plus Annual | $7.99 | per year |


## Frequently asked questions

### Is Nitrox Buddy free?

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

### Is Tech Dive free?

Tech Dive is free to download, with in-app purchases available.

### Which has better reviews, Nitrox Buddy or Tech Dive?

Tech Dive is rated higher. Nitrox Buddy averages 4.9 out of 5 from 468 ratings, while Tech Dive averages 5.0 from 2 ratings.

### Do Nitrox Buddy or Tech Dive have ads?

Neither Nitrox Buddy nor Tech Dive shows ads.

### Which is updated more often, Nitrox Buddy or Tech Dive?

Nitrox Buddy ships an update every 7 months, and Tech Dive every 4 weeks. Most recently, Nitrox Buddy was updated on September 21, 2026 and Tech Dive on September 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*