# NaviCost vs MarinersBook

The clearest difference is device support: MarinersBook at 3 against NaviCost's 1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

NaviCost ships an update every 2 weeks, MarinersBook every 10 days. The most recent releases landed on October 6, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | NaviCost | MarinersBook |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 10 days** |
| Size | 32 MB | 41 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Denys Lysiuk](https://appshunter.io/developer/6789069954) | [Oguzcan Kocaman](https://appshunter.io/developer/6795064987) |

## What reviewers say

### NaviCost

[App page](https://appshunter.io/ios/app/navicost/id6789069952)

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

**In-app purchases:** none


### MarinersBook

[App page](https://appshunter.io/ios/app/marinersbook/id6795064984)

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

**In-app purchases:** none


## Frequently asked questions

### Is NaviCost free?

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

### Is MarinersBook free?

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

### Do NaviCost or MarinersBook have ads?

Neither NaviCost nor MarinersBook shows ads.

### Which is updated more often, NaviCost or MarinersBook?

NaviCost ships an update every 2 weeks, and MarinersBook every 10 days. Most recently, NaviCost was updated on October 6, 2026 and MarinersBook 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.*