# Scuba Trainer vs NASDS

The clearest difference is in-app purchases: NASDS at none against Scuba Trainer's 3. NASDS also leads on iOS requirement (13.0 vs 18.0). Scuba Trainer's advantage is update cadence (every 2 weeks vs monthly). On price, ads and device support there is nothing between them.

Both are free to download. Scuba Trainer sells 3 in-app purchases, starting at $3.99 per 7 days. NASDS asks for nothing beyond the download.

Scuba Trainer ships an update every 2 weeks, NASDS monthly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Scuba Trainer | NASDS |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 70.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Monthly |
| Monetization | Freemium | — |
| Size | 18 MB | 42 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jan Luther](https://appshunter.io/developer/368269906) | [Christian Daume](https://appshunter.io/developer/1681383719) |

## What reviewers say

### Scuba Trainer

[App page](https://appshunter.io/ios/app/scuba-trainer-for-divers/id1308152033)

Prepare for your next dive by practicing real exam questions and mastering dive theory. This app offers adaptive learning, personalized study plans, and a comprehensive logbook to track your progress. It's designed to help you refresh your knowledge and feel confident before your certification or next adventure.

**Highlights:** Nearly 400 fact-checked exam questions, 12 topic areas including physics, physiology, and safety, Exam mode simulating real tests, Adaptive learning with smart repetition, Personalized learning plans and reminders, Progress tracking with badges and logbook

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Scuba Premium — Weekly | $3.99 | per 7 days |
| Scuba Premium — Monthly | $12.99 | per month |
| Scuba Premium — Yearly | $17.99 | per year |


### NASDS

[App page](https://appshunter.io/ios/app/nasds/id6447462158)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Scuba Trainer free?

Scuba Trainer is free to download, with in-app purchases available.

### Is NASDS free?

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

### Do Scuba Trainer or NASDS have ads?

Neither Scuba Trainer nor NASDS shows ads.

### Which is updated more often, Scuba Trainer or NASDS?

Scuba Trainer ships an update every 2 weeks, and NASDS monthly. Most recently, Scuba Trainer was updated on October 24, 2026 and NASDS on October 25, 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.*