# ObsEnMer vs Meduse

ObsEnMer and Meduse are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

ObsEnMer ships an update every 4 months, Meduse every 6 months. The most recent releases landed on September 17, 2026 and May 16, 2026 respectively.

## The numbers

| Metric | ObsEnMer | Meduse |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/obsenmer/id1162065009/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 6 months |
| Monetization | Free | — |
| Size | 185 MB | 55 MB |
| Requires iOS | 14.0 | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Altitude Cherbourg](https://appshunter.io/developer/512464175) | [ACRI](https://appshunter.io/developer/1439465848) |

## What reviewers say

### ObsEnMer

[App page](https://appshunter.io/ios/app/obsenmer/id1162065009)

Report marine animal sightings with this app. It's designed for boaters, professionals, and associations to contribute to citizen science programs. Help researchers understand marine life and climate change impacts.

**Highlights:** Report marine animal observations, Two involvement levels for boaters, Expert level for trained contributors, Species identification guide, Observation history, Species identification quizzes, Share observations on social media

**Features:** macOS Compatibility

**In-app purchases:** none


### Meduse

[App page](https://appshunter.io/ios/app/meduse/id1640058637)

**In-app purchases:** none


## Frequently asked questions

### Is ObsEnMer free?

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

### Is Meduse free?

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

### Do ObsEnMer or Meduse have ads?

Neither ObsEnMer nor Meduse shows ads.

### Which is updated more often, ObsEnMer or Meduse?

ObsEnMer ships an update every 4 months, and Meduse every 6 months. Most recently, ObsEnMer was updated on September 17, 2026 and Meduse on May 16, 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.*