# True vs Nautical Calculator Pro

The clearest difference is review sentiment: Nautical Calculator Pro at 100% against True's 0%. Nautical Calculator Pro also leads on in-app purchases (none vs 1) and update cadence (fortnightly vs every 41 months). True's advantage is price (Free vs $14.99) and ads (none vs shown). On monetization model, device support and iOS requirement there is nothing between them.

True is free to download; Nautical Calculator Pro costs $14.99 up front. True sells 1 one-off in-app purchase. Nautical Calculator Pro asks for nothing beyond the download.

True ships an update every 41 months, Nautical Calculator Pro fortnightly. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | True | Nautical Calculator Pro |
| --- | --- | --- |
| Price | **Free** | $14.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/nautical-calculator-pro/id1532372625/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 41 months | **Fortnightly** |
| Monetization | Paid | Paid |
| Size | 1 MB | 67 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nejc Landeker](https://appshunter.io/developer/712909616) | [The Vu Cong](https://appshunter.io/developer/1532372627) |

## What reviewers say

### True

[App page](https://appshunter.io/ios/app/true-wind-calculator/id712909613)

Calculate true wind direction and speed for sailing. Input vessel speed, apparent wind, and angle to determine accurate wind data.

**Highlights:** True-wind calculation, Vessel speed input, Apparent wind speed input, Apparent wind angle input, Vessel heading input

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Unlock | $4.99 | one-time |


### Nautical Calculator Pro

[App page](https://appshunter.io/ios/app/nautical-calculator-pro/id1532372625)

This app assists with critical marine navigation and maneuvering calculations. It offers tools for route planning, collision avoidance, and understanding international maritime regulations. Features include real-time ship movement, GPS, and a glossary of marine terms.

**Highlights:** Real-time ship movement, Route planning, Collision avoidance calculations, Nautical Almanac, COLREG rules, Unit conversion, Offline GPS

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

**In-app purchases:** none


## Frequently asked questions

### Is True free?

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

### Is Nautical Calculator Pro free?

Nautical Calculator Pro costs $14.99, with no in-app purchases.

### Do True or Nautical Calculator Pro have ads?

Nautical Calculator Pro shows ads; True does not.

### Which is updated more often, True or Nautical Calculator Pro?

True ships an update every 41 months, and Nautical Calculator Pro fortnightly. Most recently, True was updated on October 25, 2026 and Nautical Calculator Pro on October 30, 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.*