# Seabook+ vs IALA Marks

The clearest difference is update cadence: IALA Marks at every 6 months against Seabook+'s every 35 months. IALA Marks also leads on price ($5.99 vs $6.99). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Seabook+ costs $6.99 and IALA Marks $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Seabook+ ships an update every 35 months, IALA Marks every 6 months. The most recent releases landed on October 12, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Seabook+ | IALA Marks |
| --- | --- | --- |
| Price | $6.99 | **$5.99** |
| Rating | **[4.0 (3 ratings)](https://appshunter.io/ios/app/seabook-plus/id1517249755/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 53.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 35 months | **Every 6 months** |
| Monetization | Paid | — |
| Size | 37 MB | 25 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Ozgur GUNES](https://appshunter.io/developer/708215144) | [Sergio Guaita](https://appshunter.io/developer/634084147) |

## What reviewers say

### Seabook+

[App page](https://appshunter.io/ios/app/seabook-plus/id1517249755)

This app provides comprehensive maritime information for professionals and enthusiasts. It offers tools for navigational and technical computations, designed for easy use at sea with offline accessibility and a user-friendly interface.

**Highlights:** Comprehensive maritime information, Navigational and technical computations, Offline accessibility, User-friendly interface, Information for marine professionals, Knowledge for sea enthusiasts

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

**In-app purchases:** none


### IALA Marks

[App page](https://appshunter.io/ios/app/iala-marks/id6738844822)

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

**In-app purchases:** none


## Frequently asked questions

### Is Seabook+ free?

Seabook+ costs $6.99, with no in-app purchases.

### Is IALA Marks free?

IALA Marks costs $5.99, with no in-app purchases.

### Do Seabook+ or IALA Marks have ads?

Neither Seabook+ nor IALA Marks shows ads.

### Which is updated more often, Seabook+ or IALA Marks?

Seabook+ ships an update every 35 months, and IALA Marks every 6 months. Most recently, Seabook+ was updated on October 12, 2026 and IALA Marks on October 9, 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.*