# OstSeeTiere vs Robben.App Pro

The clearest difference is iOS requirement: Robben.App Pro at 16.4 against OstSeeTiere's 18.6. On price, update cadence, ads and in-app purchases 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, Robben.App Pro every 5 months. The most recent releases landed on June 24, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | OstSeeTiere | Robben.App Pro |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 5 months** |
| Monetization | Free | — |
| Size | 2 MB | 46 MB |
| Requires iOS | 18.6 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Emden](https://appshunter.io/developer/761214887) | [Landesbetrieb fuer Kuestenschutz, Nationalpark und Meeresschutz Schleswig-Holstein](https://appshunter.io/developer/1705383767) |

## 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


### Robben.App Pro

[App page](https://appshunter.io/ios/app/robbenapp-pro/id6464050298)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is OstSeeTiere free?

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

### Is Robben.App Pro free?

Robben.App Pro is free to download, with no in-app purchases.

### Do OstSeeTiere or Robben.App Pro have ads?

Neither OstSeeTiere nor Robben.App Pro shows ads.

### Which is updated more often, OstSeeTiere or Robben.App Pro?

OstSeeTiere ships an update every 6 months, and Robben.App Pro every 5 months. Most recently, OstSeeTiere was updated on June 24, 2026 and Robben.App Pro on September 12, 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.*