# NDL vs nDeco

The clearest difference is review sentiment: NDL at 67% against nDeco's 0%. NDL also leads on iOS requirement (12.0 vs 17.2). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

NDL ships an update every 5 months, nDeco every 7 months. The most recent releases landed on September 21, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | NDL | nDeco |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.0 (1 ratings)](https://appshunter.io/ios/app/ndeco/id6741527911/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | **66.7% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 7 months |
| Monetization | Free | Free |
| Size | 17 MB | 73 MB |
| Requires iOS | **12.0** | 17.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [NDL, UCH](https://appshunter.io/developer/1278307433) | [Eyal Vardi](https://appshunter.io/developer/988684101) |

## What reviewers say

### NDL

[App page](https://appshunter.io/ios/app/ndl/id1278307434)

Confirm your diver or freediver status online and save electronic certificates offline. This app offers a free log-book and No-decompression limit planner, along with the latest news from the National Dive League. Professionals can also manage certificates and access the NDL Professional Zone.

**Highlights:** Confirm diver status online, Save electronic certificates offline, Free log-book, No-decompression limit planner, Latest news from National Dive League, Manage certificates for professionals

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

**In-app purchases:** none


### 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 NDL free?

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

### Is nDeco free?

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

### Do NDL or nDeco have ads?

Neither NDL nor nDeco shows ads.

### Which is updated more often, NDL or nDeco?

NDL ships an update every 5 months, and nDeco every 7 months. Most recently, NDL was updated on September 21, 2026 and nDeco on September 27, 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.*