Comparison

Marnoba vs Global Alert

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

Head to head
About

Marnoba

Features
Read full description

MARNOBA is a mobile application which allows citizens and entities to send information about marine litter that is being found on their coasts and seas. This app is designed as a field notebook, it avoid carrying paper during the monitoring and helps collecting, saving and sending the obtained information about it (categories, objects and quantities) to a online free viewer on the internet leaving access for any interested person (scientist, technicians or citizens).

About

Global Alert

Report trash hot-spots in waterways and coastlines to help combat plastic pollution. Your submissions aid community cleanup efforts and the placement of waste catchment devices, contributing to healthier oceans. Download public data for research and awareness campaigns.

Highlights
  • Map trash hot-spots with photos and data
  • Connect with community cleanup organizations
  • Download public trash data
  • Contribute to ocean health initiatives
  • Report plastic waste in rivers, lakes, and coastlines
Features
Read full description

Be part of the solution! Help stop plastic pollution in our waters and ocean. Global Alert is a trash-reporting app that lets you map out trash hot-spots in our waterways, with a main focus on plastic waste in rivers, streams, lakes, and coastlines. The information you submit to the Global Alert map will help groups in your community to better decide where cleanups should take place, and where long-term catchment devices can be placed. Imagine rivers and streams to be like blood vessels that go to your heart, and your heart is the ocean. If we can stop plastic waste from “flowing through” our blood vessels, we will all be a lot healthier as a result. You can be part of this worldwide effort to remove plastic waste from our waters, resulting in all kinds of good news for our communities, and of course the ocean, which is downstream to everything. - Map trash sites on the public Global Alert map by uploading photos and data. - Make a difference. Connect with community steward organizations or cleanup teams anywhere you go. Even if you can’t help with a cleanup and just want to report trash hot-spots, your information is a huge help to other stakeholders who can help to make improvements once they know where those sites are! - Download public data. Use the map of trash hot-spots for science, school projects, raising awareness, or working with local governments to create cleaner waters. - Free to use, log in and start reporting! Officially endorsed by the World Bank’s Global Partnership for Oceans as the official trash hot-spot reporting app! Global Alert was developed through funding provided by the Global Partnership for Oceans (GPO), and under the strategic objectives of the Plastic Waste Management Program, as part of the GPO Pollution Component.

Screenshots

Marnoba4 screens
Global Alert4 screens

Verdict

The call

The clearest difference is iOS requirement: Global Alert at 7.0 against Marnoba's 15.1. On price, update cadence, 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.

UpkeepUpdate frequency

Marnoba ships an update every 6 weeks, Global Alert every 2 months. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

Scorecard1 real difference · 9 level
Marnoba versus Global Alert: the parameters behind the verdict, then further details
ParameterMarnobaGlobal Alert
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 6 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.17.0 — better
Further details — not scored
Size66 MB5 MB
Age rating4+4+
DeveloperASOC VERTIDOS CERO PARA LA PREVENCION MINIMIZACION Y ELIMINACION DE LOS VERTIDOSOcean Recovery Alliance Inc

In-app purchases

None

Marnoba

No in-app purchases

None

Global Alert

No in-app purchases

Questions

Is Marnoba free?
Marnoba is free to download, with no in-app purchases.
Is Global Alert free?
Global Alert is free to download, with no in-app purchases.
Do Marnoba or Global Alert have ads?
Neither Marnoba nor Global Alert shows ads.
Which is updated more often, Marnoba or Global Alert?
Marnoba ships an update every 6 weeks, and Global Alert every 2 months. Most recently, Marnoba was updated on November 1, 2026 and Global Alert on November 6, 2026.

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