# Nitrox Helper vs nDeco

The clearest difference is in-app purchases: nDeco at none against Nitrox Helper's 4. nDeco also leads on iOS requirement (17.2 vs 26.0). On price, update cadence, 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. nDeco asks for nothing beyond the download.

Nitrox Helper ships an update every 9 months, nDeco every 7 months. The most recent releases landed on September 15, 2026 and June 3, 2026 respectively.

## The numbers

| Metric | Nitrox Helper | nDeco |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.0 (1 ratings)](https://appshunter.io/ios/app/ndeco/id6741527911/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 7 months** |
| Monetization | — | Free |
| Size | 7 MB | 73 MB |
| Requires iOS | 26.0 | **17.2** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Robert O'Connell](https://appshunter.io/developer/1451300849) | [Eyal Vardi](https://appshunter.io/developer/988684101) |

## What reviewers say

### 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 |


### nDeco

[App page](https://appshunter.io/ios/app/ndeco/id6741527911)

Plan multi-segment dives with ease using U.S. Navy and Bühlmann decompression models. Get instant dive information, depth limit guidance, and surface interval recommendations for safe underwater adventures.

**Highlights:** Multi-segment dive planning, U.S. Navy & Bühlmann decompression models, Depth limit guidance, Instant dive information, Surface interval recommendations, Metric/imperial unit flexibility

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Nitrox Helper free?

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

### Is nDeco free?

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

### Do Nitrox Helper or nDeco have ads?

Neither Nitrox Helper nor nDeco shows ads.

### Which is updated more often, Nitrox Helper or nDeco?

Nitrox Helper ships an update every 9 months, and nDeco every 7 months. Most recently, Nitrox Helper was updated on September 15, 2026 and nDeco on June 3, 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.*