Comparison

Sealife Tracker vs COSEA

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Sealife Tracker

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
Read full description

The Sealife Tracker project aims to collect much needed data on both invasive and climate change indicator marine species around the UK coastline. It is a unique partnership between the British Sub Aqua Club, the Marine Biological Association, the Environment Agency, Scottish Natural Heritage, The Scottish Environment Protection Agency and Natural Apptitude.

About

COSEA

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
Read full description

With COSEA you can observe your marine environment, document coastal habitats or species, do activities, and report on pollution, infrastructure, and the blue economy. COSEA is a collaborative, participatory, and community-driven project. With your contributions on the map and your activity in the app, you help scientists better understand the impacts and drivers of marine factors to protect and foster healthy relationship between humans and our seas. What can you do? In COSEA you can add your photos and data, aka "Spots, on the map. By submitting your observations and documentation, you can build up an environment notebook in your user profile and map your area. You can also interact, comment, and exchange with others in the user community, or simply respond to the contribution of a friend in the app with a heart & like. We all share a deep care for our seas and their resilience in changing times. With COSEA you can help strengthen a healthy relationship between humans and our oceans and learn more about marine protection, social impacts and sustainable use of natural resources. Open Project COSEA is an open project. We invite actors, stakeholders, environment groups, associations, youth projects, and others to co-use the COSEA App for observations, data collection, and community building. During the course of the projects, we will build innovative tools for you to enable independent and self-governed usage of COSEA for your marine and coastal activities. The COSEA App is running on the SPOTTERON Citizen Science Platform at www.spotteron.net

Screenshots

Sealife Tracker4 screens
COSEA4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
Sealife Tracker versus COSEA: the parameters behind the verdict, then further details
ParameterSealife TrackerCOSEA
PriceFreeFree
Rating1.0 (2 ratings)5.0 (1 ratings) — better
Positive reviews33.3% of reviews—
Number of ratings2 — better1
Update frequencyEvery 18 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.0 — better12.0
Further details — not scored
Size37 MB206 MB
Age rating4+4+
DeveloperNatural ApptitudeSPOTTERON Gmbh

Customer experience

Sealife Tracker

All ratings2 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews9 reviews
Positive33.3%
Neutral11.1%
Negative55.6%

COSEA

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Sealife Tracker

No in-app purchases

None

COSEA

No in-app purchases

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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