# DONIA vs Taider

The clearest difference is monetization model: Taider at free against DONIA's freemium. Taider also leads on iOS requirement (11.4 vs 15.0). DONIA's advantage is update cadence (every 4 weeks vs every 2 months) and review sentiment (63% vs 50%). On price, ads, in-app purchases 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 and Taider sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

DONIA ships an update every 4 weeks, Taider every 2 months. The most recent releases landed on October 18, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | DONIA | Taider |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (34 ratings)](https://appshunter.io/ios/app/donia/id751225905/reviews)** | — |
| Number of ratings | **34** | — |
| Positive reviews | **63.3% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 2 months |
| Monetization | Freemium | **Free** |
| Size | 55 MB | 17 MB |
| Requires iOS | 15.0 | **11.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Andromede Oceanologie](https://appshunter.io/developer/740679172) | [Navcart sp. z o.o.](https://appshunter.io/developer/1451399415) |

## 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 |


### Taider

[App page](https://appshunter.io/ios/app/taider/id1451399416)

Navigate the Masurian Lakes with detailed nautical charts. Discover depth, hazards, port information, and record your routes. Offers collision alerts and route planning tools for a safer and more enjoyable sailing experience.

**Highlights:** Detailed nautical charts of Masurian Lakes, Depth, shallows, and underwater rock information, Port layouts, prices, and moorage spots, Collision alert system, Route recording and replay, Distance measurement and route planning

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Access for 365 days (promo) | $0.99 | one-time |
| Access for 365 days (promo) | $3.99 | one-time |
| Access for 365 days (promo) | $7.99 | one-time |
| Access for 7 days | $9.99 | one-time |
| Access for 365 days (promo) | $12.99 | one-time |
| Access for 365 days (promo) | $14.99 | one-time |
| Access for 365 days (promo) | $16.99 | one-time |
| Access for 14 days | $17.99 | one-time |
| Access for 365 days (promo) | $20.99 | one-time |
| Access for 365 days (promo) | $24.99 | one-time |


## Frequently asked questions

### Is DONIA free?

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

### Is Taider free?

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

### Do DONIA or Taider have ads?

Neither DONIA nor Taider shows ads.

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

DONIA ships an update every 4 weeks, and Taider every 2 months. Most recently, DONIA was updated on October 18, 2026 and Taider 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.*