# Nautical Calculator Preview vs VoyLog

The clearest difference is in-app purchases: Nautical Calculator Preview at none against VoyLog's 1. VoyLog's advantage is ads (none vs shown) and update cadence (every 4 days vs every 2 weeks). On price and device support there is nothing between them.

Both are free to download. VoyLog sells 1 in-app purchase, starting at $4.99 per month. Nautical Calculator Preview asks for nothing beyond the download.

Nautical Calculator Preview ships an update every 2 weeks, VoyLog every 4 days. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Nautical Calculator Preview | VoyLog |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/nautical-calculator-preview/id1534074231/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Monetization | Ad-supported | — |
| Size | 33 MB | 56 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [The Vu Cong](https://appshunter.io/developer/1532372627) | [METRICS TR DANISMANLIK VE DIS TICARET ANONIM SIRKETI](https://appshunter.io/developer/6783287410) |

## What reviewers say

### Nautical Calculator Preview

[App page](https://appshunter.io/ios/app/nautical-calculator-preview/id1534074231)

This app assists with critical marine navigation and maneuvering tasks. It offers real-time ship movement tracking, route planning, and complex sailing calculations. Additionally, it provides tools for collision avoidance, learning maritime regulations, and accessing a nautical almanac.

**Highlights:** Real-Time Ship Movement, Route Planning, Mercator & Great Circle Sailing, Collision Avoidance, Nautical Almanac, COLREG Rules & Marine Signalization, Unit Conversion

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

**In-app purchases:** none


### VoyLog

[App page](https://appshunter.io/ios/app/voylog/id6784607636)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VoyLog Pro | $4.99 | per month |


## Frequently asked questions

### Is Nautical Calculator Preview free?

Nautical Calculator Preview is free to download, with no in-app purchases.

### Is VoyLog free?

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

### Do Nautical Calculator Preview or VoyLog have ads?

Nautical Calculator Preview shows ads; VoyLog does not.

### Which is updated more often, Nautical Calculator Preview or VoyLog?

Nautical Calculator Preview ships an update every 2 weeks, and VoyLog every 4 days. Most recently, Nautical Calculator Preview was updated on November 7, 2026 and VoyLog on October 31, 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.*