# Maritime Master vs SailPrep

The clearest difference is update cadence: SailPrep at every 2 weeks against Maritime Master's every 6 weeks. SailPrep also leads on iOS requirement (15.1 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

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

Maritime Master ships an update every 6 weeks, SailPrep every 2 weeks. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Maritime Master | SailPrep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/maritime-master-skipper/id6749545029/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 10 MB | 66 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [MARITIME MASTER LIMITED](https://appshunter.io/developer/1107589346) | [Monika Zibolyte](https://appshunter.io/developer/6772920181) |

## What reviewers say

### Maritime Master

[App page](https://appshunter.io/ios/app/maritime-master-skipper/id6749545029)

Learn seamanship and small-craft navigation with interactive diagrams and calculators. Practice plotting positions, understanding tides, and mastering navigation techniques. Includes a reference library for essential maritime knowledge.

**Highlights:** Interactive diagrams and calculators, Dead reckoning and estimated position plotting, Tidal height and stream visualization, Position fixing and compass error modules, COLREGs, VHF, and meteorology reference, Speed-time-distance and unit conversion calculators

**Features:** macOS Compatibility

**In-app purchases:** none


### SailPrep

[App page](https://appshunter.io/ios/app/sailprep/id6772920179)

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

**In-app purchases:** none


## Frequently asked questions

### Is Maritime Master free?

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

### Is SailPrep free?

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

### Do Maritime Master or SailPrep have ads?

Neither Maritime Master nor SailPrep shows ads.

### Which is updated more often, Maritime Master or SailPrep?

Maritime Master ships an update every 6 weeks, and SailPrep every 2 weeks. Most recently, Maritime Master was updated on October 24, 2026 and SailPrep on October 31, 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.*