# DONIA vs PosidoniaMaps

The clearest difference is in-app purchases: PosidoniaMaps at none against DONIA's 2. PosidoniaMaps also leads on review sentiment (80% vs 59%). DONIA's advantage is update cadence (fortnightly vs every 5 months) and iOS requirement (11.0 vs 14.5). On price, ads and device support there is nothing between them.

Both are free to download. DONIA sells 2 in-app purchases, starting at $2.49 per month. PosidoniaMaps asks for nothing beyond the download.

DONIA ships an update fortnightly, PosidoniaMaps every 5 months. The most recent releases landed on September 22, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | DONIA | PosidoniaMaps |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (31 ratings)](https://appshunter.io/ios/app/donia/id751225905/reviews)** | — |
| Number of ratings | **31** | — |
| Positive reviews | 59.3% of reviews | **80.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 5 months |
| Monetization | Freemium | **Free** |
| Size | 61 MB | 68 MB |
| Requires iOS | **11.0** | 14.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Andromede Oceanologie](https://appshunter.io/developer/740679172) | [Movired 2000 S.L.](https://appshunter.io/developer/1394037133) |

## What reviewers say

### DONIA

[App page](https://appshunter.io/ios/app/donia/id751225905)

This app provides detailed seabed visualization and marine information for safe and respectful sea navigation. It allows users to book mooring buoys, share observations, and monitor their vessels. Access premium features like high-definition charts for enhanced planning and exploration.

**Highlights:** Seabed visualization, Marine information access, Mooring buoy booking, User observation sharing, Navigation preparation and monitoring, Mooring monitoring with alarms, Offline mapping

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DONIA® Premium Monthly | $2.49 | per month |
| DONIA® Premium Version | $22.99 | per year |


### PosidoniaMaps

[App page](https://appshunter.io/ios/app/posidoniamaps/id1409763408)

This app provides high-resolution underwater maps to help boaters navigate and find safe mooring spots, even in poor visibility. It aims to protect vital Posidonia oceanic meadows by making them visible and encouraging responsible anchoring.

**Highlights:** High-resolution underwater maps, Safe mooring guidance, Low visibility navigation, Posidonia meadow mapping, Environmental protection tool

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DONIA free?

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

### Is PosidoniaMaps free?

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

### Do DONIA or PosidoniaMaps have ads?

Neither DONIA nor PosidoniaMaps shows ads.

### Which is updated more often, DONIA or PosidoniaMaps?

DONIA ships an update fortnightly, and PosidoniaMaps every 5 months. Most recently, DONIA was updated on September 22, 2026 and PosidoniaMaps on June 1, 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.*