# Z dive log vs Nitrox Helper

The clearest difference is in-app purchases: Z dive log at none against Nitrox Helper's 4. Z dive log also leads on update cadence (every 4 months vs every 9 months) and iOS requirement (16.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Nitrox Helper sells 4 in-app purchases, starting at $0.99 per month. Z dive log asks for nothing beyond the download.

Z dive log ships an update every 4 months, Nitrox Helper every 9 months. The most recent releases landed on June 1, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Z dive log | Nitrox Helper |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/z-dive-log/id1202116382/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 58.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 9 months |
| Monetization | Free | — |
| Size | 40 MB | 7 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [SCUBAPRO ASIA LTD.](https://appshunter.io/developer/1202116381) | [Robert O'Connell](https://appshunter.io/developer/1451300849) |

## What reviewers say

### Z dive log

[App page](https://appshunter.io/ios/app/z-dive-log/id1202116382)

Easily manage your SCUBAPRO Z1 dive computer logs and settings. Download dive data via Bluetooth, add details like location and photos, and configure your dive computer's preferences.

**Highlights:** Download dive logs via Bluetooth, Enter and edit dive log details, Add photos to dive logs, View dive statistics at a glance, Configure Z1 dive computer settings, Save and share depth graph images

**In-app purchases:** none


### Nitrox Helper

[App page](https://appshunter.io/ios/app/nitrox-helper/id1451300850)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $0.99 | per month |
| Pro 6 Monthly | $5.99 | per 6 months |
| Pro Annual | $9.99 | per year |
| Pro Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is Z dive log free?

Z dive log is free to download, with no in-app purchases.

### Is Nitrox Helper free?

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

### Do Z dive log or Nitrox Helper have ads?

Neither Z dive log nor Nitrox Helper shows ads.

### Which is updated more often, Z dive log or Nitrox Helper?

Z dive log ships an update every 4 months, and Nitrox Helper every 9 months. Most recently, Z dive log was updated on June 1, 2026 and Nitrox Helper on September 15, 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.*