# IALA Navigation Marks vs SOLAS4

The clearest difference is iOS requirement: SOLAS4 at 11.0 against IALA Navigation Marks's 15.6. On price, ads, in-app purchases and device support there is nothing between them.

IALA Navigation Marks costs $1.99 and SOLAS4 $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | IALA Navigation Marks | SOLAS4 |
| --- | --- | --- |
| Price | $1.99 | $1.99 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 23 months | — |
| Monetization | Paid | — |
| Size | 28 MB | 69 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Smirnov Yury](https://appshunter.io/developer/420438416) | [OLEKSANDR IZERGIN](https://appshunter.io/developer/1678396126) |

## What reviewers say

### IALA Navigation Marks

[App page](https://appshunter.io/ios/app/iala-navigation-marks/id1224059816)

A quick reference guide for sailors and students to identify maritime navigation marks according to the IALA system. It covers buoy shapes, colors, topmarks, and light rhythms for various mark types, aiding in exam preparation and on-water identification.

**Highlights:** Identify lateral, cardinal, and special marks, Covers buoy shape, color, topmark, and light rhythm, Includes day and night views, Practical study aid for seamanship training, Quick lookup on iPhone and iPad

**In-app purchases:** none


### SOLAS4

[App page](https://appshunter.io/ios/app/solas4/id6468890931)

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

**In-app purchases:** none


## Frequently asked questions

### Is IALA Navigation Marks free?

IALA Navigation Marks costs $1.99, with no in-app purchases.

### Is SOLAS4 free?

SOLAS4 costs $1.99, with no in-app purchases.

### Do IALA Navigation Marks or SOLAS4 have ads?

Neither IALA Navigation Marks nor SOLAS4 shows ads.

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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.*