# OstSeeTiere vs easyTRX3

The clearest difference is update cadence: OstSeeTiere at every 6 months against easyTRX3's every 16 months. easyTRX3's advantage is iOS requirement (11.0 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.

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

OstSeeTiere ships an update every 6 months, easyTRX3 every 16 months. The most recent releases landed on November 1, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | OstSeeTiere | easyTRX3 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 16 months |
| Monetization | Free | — |
| Size | 2 MB | 52 MB |
| Requires iOS | 18.6 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Emden](https://appshunter.io/developer/761214887) | [Weatherdock AG](https://appshunter.io/developer/554111402) |

## What reviewers say

### OstSeeTiere

[App page](https://appshunter.io/ios/app/ostseetiere/id943239243)

Report sightings and strandings of Baltic Sea marine mammals, including porpoises and seals. All submitted data is publicly displayed on an interactive map and scientifically analyzed to aid conservation efforts and research.

**Highlights:** Report marine mammal sightings, Report marine mammal strandings, Interactive map of sightings, Scientific data analysis, Supports conservation efforts, Information on porpoises and seals

**Features:** macOS Compatibility

**In-app purchases:** none


### easyTRX3

[App page](https://appshunter.io/ios/app/easytrx3-manager/id1450755474)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OstSeeTiere free?

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

### Is easyTRX3 free?

easyTRX3 is free to download, with no in-app purchases.

### Do OstSeeTiere or easyTRX3 have ads?

Neither OstSeeTiere nor easyTRX3 shows ads.

### Which is updated more often, OstSeeTiere or easyTRX3?

OstSeeTiere ships an update every 6 months, and easyTRX3 every 16 months. Most recently, OstSeeTiere was updated on November 1, 2026 and easyTRX3 on October 26, 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.*