# U.S. Inland Navigational Rules vs True

The clearest difference is review sentiment: U.S. Inland Navigational Rules at 75% against True's 0%. U.S. Inland Navigational Rules also leads on in-app purchases (none vs 1) and chart position (#178 vs unranked). True's advantage is price (Free vs $2.99). On update cadence, ads, monetization model and device support there is nothing between them.

True is free to download; U.S. Inland Navigational Rules costs $2.99 up front. True sells 1 one-off in-app purchase. U.S. Inland Navigational Rules asks for nothing beyond the download.

U.S. Inland Navigational Rules ships an update every 27 months, True every 41 months. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | U.S. Inland Navigational Rules | True |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.3 (6 ratings)](https://appshunter.io/ios/app/us-inland-navigational-rules/id658906836/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | **75.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 27 months** | Every 41 months |
| Monetization | Paid | Paid |
| Best chart rank | **#178** | — |
| Size | 23 MB | 1 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [The Other Hat](https://appshunter.io/developer/573973071) | [Nejc Landeker](https://appshunter.io/developer/712909616) |

## What reviewers say

### U.S. Inland Navigational Rules

[App page](https://appshunter.io/ios/app/us-inland-navigational-rules/id658906836)

**Currently charting:** #178 Top Paid · Navigation (US App Store)

This app provides comprehensive Inland Navigation Rules for U.S. inland waters and the Great Lakes. It features over 100 custom illustrations and captions for easy learning, along with bonus emergency procedures for boaters.

**Highlights:** Complete Inland Navigation Rules, 100+ explanatory illustrations, Bonus emergency procedures section, Reference, learning, and revision tool, Researched by nautical experts, Covers Steering & Sailing Rules, Lights & Shapes, Signals

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is U.S. Inland Navigational Rules free?

U.S. Inland Navigational Rules costs $2.99, with no in-app purchases.

### Is True free?

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

### Do U.S. Inland Navigational Rules or True have ads?

Neither U.S. Inland Navigational Rules nor True shows ads.

### Which is updated more often, U.S. Inland Navigational Rules or True?

U.S. Inland Navigational Rules ships an update every 27 months, and True every 41 months. Most recently, U.S. Inland Navigational Rules was updated on October 29, 2026 and True 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.*