# Navigation Rules Pro vs Tremap

The clearest difference is price: Tremap at Free against Navigation Rules Pro's $4.99. Tremap also leads on update cadence (every 3 weeks vs every 3 months) and rating (5.0 vs 4.8). Navigation Rules Pro's advantage is ratings volume (442 vs 2) and chart position (#103 vs unranked). On ads, in-app purchases and device support there is nothing between them.

Tremap is free to download; Navigation Rules Pro costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Tremap holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Navigation Rules Pro has 442 ratings behind it against 2, so its average is the more settled of the two.

Navigation Rules Pro ships an update every 3 months, Tremap every 3 weeks. The most recent releases landed on September 26, 2026 and June 5, 2026 respectively.

## The numbers

| Metric | Navigation Rules Pro | Tremap |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.8 (442 ratings)](https://appshunter.io/ios/app/navigation-rules-pro/id494309072/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/tremap/id1669477980/reviews)** |
| Number of ratings | **442** | 2 |
| Positive reviews | 85.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Paid | **Free** |
| Best chart rank | **#103** | — |
| Size | 37 MB | 80 MB |
| Requires iOS | **9.3** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Calculated Industries](https://appshunter.io/developer/370406449) | [R&D Commercial Ltd](https://appshunter.io/developer/1577170504) |

## What reviewers say

### Navigation Rules Pro

[App page](https://appshunter.io/ios/app/navigation-rules-pro/id494309072)

**Currently charting:** #103 Top Paid · Reference (US App Store)

This app provides comprehensive boating regulations and reference materials, including international and inland navigation rules, sound and light signals, and communication information. It features quick references, calculators, and unit conversions for boaters.

**Highlights:** International and Inland Navigation Rules, Sound and Light Signals Quick Reference, Aids to Navigation (AtoN), Communication Information (DSC, Morse Code, etc.), Boating Calculators, Unit Conversions, Search and Favorites functionality

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

**In-app purchases:** none


### Tremap

[App page](https://appshunter.io/ios/app/tremap/id1669477980)

This app allows users to map and record trees globally, cataloging species, locations, and conditions. It contributes to a worldwide digital tree inventory, supported by species sponsors.

**Highlights:** Map trees with GPS accuracy, Record species, photos, and notes, Contribute to global tree inventory, Track tree condition changes, Export tree data for reports, Interactive team maps

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

**In-app purchases:** none


## Frequently asked questions

### Is Navigation Rules Pro free?

Navigation Rules Pro costs $4.99, with no in-app purchases.

### Is Tremap free?

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

### Which has better reviews, Navigation Rules Pro or Tremap?

Tremap is rated higher. Navigation Rules Pro averages 4.8 out of 5 from 442 ratings, while Tremap averages 5.0 from 2 ratings.

### Do Navigation Rules Pro or Tremap have ads?

Neither Navigation Rules Pro nor Tremap shows ads.

### Which is updated more often, Navigation Rules Pro or Tremap?

Navigation Rules Pro ships an update every 3 months, and Tremap every 3 weeks. Most recently, Navigation Rules Pro was updated on September 26, 2026 and Tremap on June 5, 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.*