# Nitrox Buddy vs TrackLinc

The clearest difference is in-app purchases: TrackLinc at none against Nitrox Buddy's 1. TrackLinc also leads on update cadence (every 2 weeks vs every 7 months) and iOS requirement (15.0 vs 26.0). Nitrox Buddy's advantage is ratings volume (489 vs 2). 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. TrackLinc 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 TrackLinc. That said, the two scores are not equally well evidenced: Nitrox Buddy has 489 ratings behind it against 2, so its average is the more settled of the two.

Nitrox Buddy ships an update every 7 months, TrackLinc every 2 weeks. The most recent releases landed on October 17, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Nitrox Buddy | TrackLinc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (489 ratings)](https://appshunter.io/ios/app/nitrox-buddy/id572411073/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/tracklinc/id6780310670/reviews)** |
| Number of ratings | **489** | 2 |
| Positive reviews | 95.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 6 MB | 7 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Gereon Steffens](https://appshunter.io/developer/493030228) | [wkw development LLC](https://appshunter.io/developer/6780310672) |

## 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)


### TrackLinc

[App page](https://appshunter.io/ios/app/tracklinc/id6780310670)

Easily buy and store motorsports tickets on your phone. Access your tickets even without a signal, ensuring you never miss an event. Manage orders, transfers, and receive important event updates.

**Highlights:** Buy motorsports event tickets, Store tickets on device, Offline ticket access, Itemized fee display, Secure Stripe payments, Order history and updates, Ticket transfers and refunds

**Features:** macOS Compatibility, Apple Wallet, 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 TrackLinc free?

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

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

TrackLinc is rated higher. Nitrox Buddy averages 4.9 out of 5 from 489 ratings, while TrackLinc averages 5.0 from 2 ratings.

### Do Nitrox Buddy or TrackLinc have ads?

Neither Nitrox Buddy nor TrackLinc shows ads.

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

Nitrox Buddy ships an update every 7 months, and TrackLinc every 2 weeks. Most recently, Nitrox Buddy was updated on October 17, 2026 and TrackLinc on October 6, 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.*