Comparison

Mega Fauna vs COSEA

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

Head to head
About

Mega Fauna

Features
Read full description

Mega Fauna is an educational guide, free to use for identification of different species of marine and terrestrial mammals of the Indian subcontinent. The first release brings to you 31 Marine Mammal species with descriptions in 16 languages. In the hope that the app is useful for students, seafaring officers, researchers, fishers, policy makers and naturalists. Fishermen or those who spend most time at sea can use the app for identifying marine mammals & thus support conservation efforts by reporting sightings, standings as well as releasing accidentally caught marine mammals. The app works without internet connectivity and does not require any login or registration in order to access the information. Future improvements are planned to add more photos, vocalisations & updated info on different species.

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
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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

Mega Fauna4 screens
COSEA4 screens

Verdict

The call

The clearest difference is update cadence: COSEA at every 5 weeks against Mega Fauna's every 3 months. On price, ads, in-app purchases and device support 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.

UpkeepUpdate frequency

Mega Fauna ships an update every 3 months, COSEA every 5 weeks. The most recent releases landed on September 9, 2026 and August 14, 2026 respectively.

Scorecard1 real difference · 8 level
Mega Fauna versus COSEA: the parameters behind the verdict, then further details
ParameterMega FaunaCOSEA
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 3 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS12.412.0 — better
Further details — not scored
Size34 MB206 MB
Age rating4+4+
DeveloperAakash RatheeSPOTTERON Gmbh

In-app purchases

None

Mega Fauna

No in-app purchases

None

COSEA

No in-app purchases

Questions

Is Mega Fauna free?
Mega Fauna is free to download, with no in-app purchases.
Is COSEA free?
COSEA is free to download, with no in-app purchases.
Do Mega Fauna or COSEA have ads?
Neither Mega Fauna nor COSEA shows ads.
Which is updated more often, Mega Fauna or COSEA?
Mega Fauna ships an update every 3 months, and COSEA every 5 weeks. Most recently, Mega Fauna was updated on September 9, 2026 and COSEA on August 14, 2026.

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