# CSM LearnStrike vs Marine Survey Assistant

The clearest difference is in-app purchases: CSM LearnStrike at none against Marine Survey Assistant's 9. CSM LearnStrike also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Marine Survey Assistant sells 9 one-off in-app purchases. CSM LearnStrike asks for nothing beyond the download.

CSM LearnStrike ships an update every 3 weeks, Marine Survey Assistant every 4 weeks. The most recent releases landed on October 25, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | CSM LearnStrike | Marine Survey Assistant |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/marine-survey-assistant/id6475769290/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Every 4 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 301 MB | 143 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [4Growth.com](https://appshunter.io/developer/1728434002) | [Stanislav Soroka](https://appshunter.io/developer/1701402639) |

## What reviewers say

### CSM LearnStrike

[App page](https://appshunter.io/ios/app/csm-learnstrike/id6450264607)

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

**In-app purchases:** none


### Marine Survey Assistant

[App page](https://appshunter.io/ios/app/marine-survey-assistant/id6475769290)

This app offers a comprehensive suite of tools and information for marine professionals. It includes various calculators for draft, ballast, oil, and cargo, along with marine news, a port logbook, and video courses. Users can also manage documents and track contracts.

**Highlights:** Draft Survey Calculator, Ballast Calculator, Oil & Cargo Calculators, ETA & Slip Calculators, Unit Converter, Port Log Book, Marine News & Documents

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |
| Squat & UKC Calculator | $5.99 | one-time |
| ME Power Calculator | $6.99 | one-time |
| Draft & GM Calculator | $7.99 | one-time |
| Video Courses | $9.99 | one-time |
| Ballast Calculator | $14.99 | one-time |
| Сargo Trimming Calculator | $14.99 | one-time |
| Oil Calculator | $14.99 | one-time |
| Draft Survey Calculator | $17.99 | one-time |


## Frequently asked questions

### Is CSM LearnStrike free?

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

### Is Marine Survey Assistant free?

Marine Survey Assistant is free to download, with in-app purchases available.

### Do CSM LearnStrike or Marine Survey Assistant have ads?

Marine Survey Assistant shows ads; CSM LearnStrike does not.

### Which is updated more often, CSM LearnStrike or Marine Survey Assistant?

CSM LearnStrike ships an update every 3 weeks, and Marine Survey Assistant every 4 weeks. Most recently, CSM LearnStrike was updated on October 25, 2026 and Marine Survey Assistant on October 16, 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.*