# Nitrox Buddy vs Deep Tools

The clearest difference is review sentiment: Nitrox Buddy at 96% against Deep Tools's 50%. Nitrox Buddy also leads on rating (4.9 vs 4.6) and ratings volume (490 vs 93). Deep Tools's advantage is update cadence (every 2 months vs every 7 months) and iOS requirement (17.0 vs 26.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Nitrox Buddy sells 1 one-off in-app purchase and Deep Tools sells 3 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

Nitrox Buddy holds the better App Store score, 4.9 against 4.6. That said, the two scores are not equally well evidenced: Nitrox Buddy has 490 ratings behind it against 93, 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 Deep Tools's.

Nitrox Buddy ships an update every 7 months, Deep Tools every 2 months. Both last shipped on November 13, 2026.

## The numbers

| Metric | Nitrox Buddy | Deep Tools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (490 ratings)](https://appshunter.io/ios/app/nitrox-buddy/id572411073/reviews)** | [4.6 (93 ratings)](https://appshunter.io/ios/app/deep-tools/id1476093876/reviews) |
| Number of ratings | **490** | 93 |
| Positive reviews | **95.8% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 6 MB | 13 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Gereon Steffens](https://appshunter.io/developer/493030228) | [Deep Blue d.o.o.](https://appshunter.io/developer/1476093875) |

## 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)


### Deep Tools

[App page](https://appshunter.io/ios/app/deep-tools/id1476093876)

This app is a comprehensive tool for divers, offering dive planning, logging, and gas blending. It supports recreational, technical, and rebreather diving with advanced decompression planning and dive computer integration. Plan complex dives, log your adventures, and mix gases with precision.

**Highlights:** Decompression dive planning (Bühlmann ZH-L16), Dive log with Shearwater import, Nitrox and Trimix gas blending, Multiple dive calculators, Metric and imperial unit support, Multi-level and repetitive dive planning

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscription Monthly | $7.99 | per month |
| Subscription Yearly | $22.99 | per year |
| Lifetime Subscription | $49.99 | one-time |


## Frequently asked questions

### Is Nitrox Buddy free?

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

### Is Deep Tools free?

Deep Tools is free to download, with in-app purchases available.

### Which has better reviews, Nitrox Buddy or Deep Tools?

Nitrox Buddy is rated higher. Nitrox Buddy averages 4.9 out of 5 from 490 ratings, while Deep Tools averages 4.6 from 93 ratings.

### Do Nitrox Buddy or Deep Tools have ads?

Neither Nitrox Buddy nor Deep Tools shows ads.

### Which is updated more often, Nitrox Buddy or Deep Tools?

Nitrox Buddy ships an update every 7 months, and Deep Tools every 2 months. Most recently, Nitrox Buddy was updated on November 13, 2026 and Deep Tools on November 13, 2026.

---

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