# Nautical Calculator. vs Maritime Master

The clearest difference is update cadence: Maritime Master at daily against Nautical Calculator.'s every 5 months. Nautical Calculator.'s advantage is iOS requirement (15.6 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Nautical Calculator. sells 1 one-off in-app purchase and Maritime Master sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Nautical Calculator. ships an update every 5 months, Maritime Master daily. The most recent releases landed on October 30, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Nautical Calculator. | Maritime Master |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (1 ratings)](https://appshunter.io/ios/app/maritime-master-calcdeck/id6760967809/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Daily** |
| Monetization | — | Free |
| Size | 43 MB | 7 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [Nanjibhai Gorasiya](https://appshunter.io/developer/1834066312) | [MARITIME MASTER LIMITED](https://appshunter.io/developer/1107589346) |

## What reviewers say

### Nautical Calculator.

[App page](https://appshunter.io/ios/app/nautical-calculator/id6755711720)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime premium | $12.99 | one-time |


### Maritime Master

[App page](https://appshunter.io/ios/app/maritime-master-calcdeck/id6760967809)

This app provides a comprehensive suite of 88 professional maritime calculators for navigation, celestial observation, tides, stability, weather, engineering, and more. It's designed for maritime professionals and enthusiasts, offering offline functionality and citing all formulas with their official sources.

**Highlights:** 88 professional maritime calculators, Offline functionality, Navigation calculations, Celestial observation tools, Stability and cargo calculations, Unit converters

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CalcDeck Pro | $14.99 | one-time |


## Frequently asked questions

### Is Nautical Calculator. free?

Nautical Calculator. is free to download, with in-app purchases available.

### Is Maritime Master free?

Maritime Master is free to download, with in-app purchases available.

### Do Nautical Calculator. or Maritime Master have ads?

Neither Nautical Calculator. nor Maritime Master shows ads.

### Which is updated more often, Nautical Calculator. or Maritime Master?

Nautical Calculator. ships an update every 5 months, and Maritime Master daily. Most recently, Nautical Calculator. was updated on October 30, 2026 and Maritime Master on November 4, 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.*