# Sealife Tracker vs COSEA

The clearest difference is rating: COSEA at 5.0 against Sealife Tracker's 1.0. COSEA also leads on update cadence (every 5 weeks vs every 18 months). Sealife Tracker's advantage is iOS requirement (8.0 vs 12.0). On price, ratings volume, 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.

COSEA holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Sealife Tracker ships an update every 18 months, COSEA every 5 weeks. The most recent releases landed on October 3, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Sealife Tracker | COSEA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (2 ratings)](https://appshunter.io/ios/app/sealife-tracker/id663800293/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cosea/id6503368314/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 5 weeks** |
| Monetization | Free | Free |
| Size | 37 MB | 206 MB |
| Requires iOS | **8.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Natural Apptitude](https://appshunter.io/developer/815539119) | [SPOTTERON Gmbh](https://appshunter.io/developer/1378099707) |

## What reviewers say

### Sealife Tracker

[App page](https://appshunter.io/ios/app/sealife-tracker/id663800293)

This app collects data on marine species along the UK coastline, focusing on invasive and climate change indicator species. It's a collaborative project involving several environmental organizations and diving clubs.

**Highlights:** Marine species data collection, UK coastline focus, Invasive species tracking, Climate change indicator species, Environmental partnership project

**Features:** macOS Compatibility

**In-app purchases:** none


### COSEA

[App page](https://appshunter.io/ios/app/cosea/id6503368314)

Document marine environments, coastal habitats, and species. Report on pollution, infrastructure, and the blue economy. Contribute data and photos to a collaborative map to help scientists understand marine factors and foster a healthy relationship between humans and the sea.

**Highlights:** Observe marine environments, Document coastal habitats and species, Report on pollution and infrastructure, Add photos and data to a collaborative map, Interact with the user community, Build an environment notebook

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

**In-app purchases:** none


## Frequently asked questions

### Is Sealife Tracker free?

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

### Is COSEA free?

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

### Which has better reviews, Sealife Tracker or COSEA?

COSEA is rated higher. Sealife Tracker averages 1.0 out of 5 from 2 ratings, while COSEA averages 5.0 from 1 ratings.

### Do Sealife Tracker or COSEA have ads?

Neither Sealife Tracker nor COSEA shows ads.

### Which is updated more often, Sealife Tracker or COSEA?

Sealife Tracker ships an update every 18 months, and COSEA every 5 weeks. Most recently, Sealife Tracker was updated on October 3, 2026 and COSEA on October 7, 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.*