# OstSeeTiere vs Robben.App

The clearest difference is iOS requirement: Robben.App 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.

Both ship on a similar rhythm, roughly every 6 months. The most recent releases landed on June 24, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | OstSeeTiere | Robben.App |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | Every 6 months |
| Monetization | Free | — |
| Size | 2 MB | 51 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

[App page](https://appshunter.io/ios/app/robbenapp/id6464050244)

**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 free?

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

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

Neither OstSeeTiere nor Robben.App shows ads.

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

OstSeeTiere ships an update every 6 months, and Robben.App every 6 months. Most recently, OstSeeTiere was updated on June 24, 2026 and Robben.App on September 19, 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.*