# Nautical Calculator Pro vs Logarithmic Scale

The clearest difference is price: Logarithmic Scale at Free against Nautical Calculator Pro's $14.99. Logarithmic Scale also leads on ratings volume (4 vs 1) and iOS requirement (15.4 vs 17.0). Nautical Calculator Pro's advantage is in-app purchases (none vs 1) and device support. On rating, review sentiment and update cadence there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Nautical Calculator Pro against 5.0 for Logarithmic Scale. Both are backed by a comparable volume of ratings — 1 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Nautical Calculator Pro ships an update fortnightly, Logarithmic Scale every 8 days. The most recent releases landed on October 25, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Nautical Calculator Pro | Logarithmic Scale |
| --- | --- | --- |
| Price | $14.99 | **Free** |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/nautical-calculator-pro/id1532372625/reviews) | [5.0 (4 ratings)](https://appshunter.io/ios/app/logarithmic-scale/id6756836546/reviews) |
| Number of ratings | 1 | **4** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | — |
| Update frequency | Fortnightly | **Every 8 days** |
| Monetization | Paid | **Free** |
| Size | 67 MB | 6 MB |
| Requires iOS | 17.0 | **15.4** |
| Devices | **iPhone, iPad** | — |
| Age rating | 4+ | 4+ |
| Developer | [The Vu Cong](https://appshunter.io/developer/1532372627) | [GEORGII BABUKHADIIA](https://appshunter.io/developer/1859099132) |

## What reviewers say

### Nautical Calculator Pro

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

This app provides comprehensive tools for marine navigation, including real-time ship movement, route planning, and advanced calculations for sailing and maneuvering. It also offers learning resources on maritime regulations and signaling.

**Highlights:** Real-Time Ship Movement, Route Planning, Sailing Calculations (Mercator, Great Circle), Collision Avoidance Maneuvers, Wind and Current Calculations, Nautical Almanac, COLREG Rules and Marine Signaling

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

**In-app purchases:** none


### Logarithmic Scale

[App page](https://appshunter.io/ios/app/logarithmic-scale/id6756836546)

Calculate travel time based on distance and average speed. Ideal for calculating estimated arrival times for mechanical ships.

**Highlights:** Passage time calculations, ETA estimation, Speed and distance input, Mechanical ship focus

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


## Frequently asked questions

### Is Nautical Calculator Pro free?

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

### Is Logarithmic Scale free?

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

### Which has better reviews, Nautical Calculator Pro or Logarithmic Scale?

Nautical Calculator Pro and Logarithmic Scale are both rated 5.0 out of 5 on the App Store, from 1 and 4 ratings respectively.

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

Nautical Calculator Pro ships an update fortnightly, and Logarithmic Scale every 8 days. Most recently, Nautical Calculator Pro was updated on October 25, 2026 and Logarithmic Scale on October 19, 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.*