Comparison

Marine Debris Tracker vs Climate Action Now

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

Head to head
About

Marine Debris Tracker

Contribute to a global citizen science movement by reporting litter and plastic pollution. Your data helps build a comprehensive understanding of environmental issues, informing research and policy.

Highlights
  • Report litter and debris
  • Contribute to citizen science
  • Track inland and marine pollution
  • Access open-data platform
  • Generate scientific findings
  • Inform policy decisions
Features
Read full description

Debris Tracker is an open data citizen science movement, powered by Morgan Stanley. Join us in creating a bigger picture of the plastic pollution crisis by using the app to report litter wherever you find it, from our oceans to your backyard. Every day, dedicated educational, non-profit, and scientific organizations and passionate citizen scientists from all around the world use the Debris Tracker app to record GPS data on inland and marine debris. To date, Debris Tracker users have contributed 2 million items to our open-data platform, hosted at the University of Georgia and accessible to researchers and curious citizens everywhere. Together we can create a more comprehensive understanding of marine debris and plastic pollution by collecting and sharing data, generating scientific findings, informing policy, and inspiring upstream solutions. See our website for more information on how to get started or to download data: http://www.marinedebris.engr.uga.edu/. Debris Tracker is a joint effort of the NOAA Marine Debris Program and the Southeast Atlantic Marine Debris Initiative (SEA-MDI) out of the University of Georgia College of Engineering. Continued use of GPS in the background can dramatically decrease battery life.

About

Climate Action Now

This app empowers users to advocate for climate action by providing pre-written messages to send to political and business leaders. It simplifies contacting officials, educates users on issues, and rewards actions with real tree plantings. Users can also engage with a community feed and join teams for collective impact.

Highlights
  • Send personalized messages to leaders
  • Contact elected officials and CEOs
  • Learn about climate issues
  • Earn real trees for actions
  • Join teams and compete
  • Share actions in a community feed
Features
Read full description

Public opinion is the only effective counterweight to the immense power of the fossil fuel industry. The industry knows this, which is why it spends so much time and money trying to shape it. Your opinion really does matter. It is your superpower. But it doesn’t count for much if you don’t express it. The Climate Action Now app can help you with that. It is your opinion amplifier. It is your megaphone. This app does the work so that you don’t have to. It provides an endless stream of well-researched, well-written, personalized messages that you can send to political and business leaders advocating for climate action in just seconds with just a few touches! And you’ll learn a lot about the issues and earn real trees as you go. FAST. Most actions in the app – like contacting your elected officials, emailing CEOs, or asking media influencers to step up – can be taken with just a few touches in just a few seconds. We’ve done all the work for you so that you don’t need to. Don’t know who your elected officials are? Give the app your location, and it will tell you. Don’t know how to contact them? The app has their email addresses and phone numbers. Don’t know what to tell them? The app gives you personalized, well-written, powerful messages that you can send in seconds. IMPACTFUL. Climate Action Now gives you, whether you are a concerned citizen or a hard-core climate activist, the means to take thousands of individual, collective, and systemic actions NOW. To date, app users have sent over one MILLION messages and planted over 47,000 trees. You can send an impactful message in seconds. Did you know that just 100 companies, and the politicians, investors, and regulators who enable them, are responsible for over 70% of the world’s emissions? Climate Action Now makes it easy for you to influence them with emails, petitions, and phone calls. Did you know that the fossil fuel industry is poisoning communities of color in their own backyards? Climate Action Now helps you fight these injustices and demand an equitable future for all. Did you know that leading climate activists say the most important thing you can do about climate change is to talk about it? Every action you take with Climate Action Now is automatically posted to the app's Community Feed where people can see it, take that action also, comment on it, like it, and share it with others. REWARDING. Every action you take earns points, and when you’ve earned enough points, a real tree will be planted. Every action you take sets an example for others to follow. Join a team and every action you take contributes to the team’s total and helps it win rivalries with other teams. Through all these things, you earn the most important reward of all: knowing that you’re doing your part to save our planet. Time is short, and the future is in our hands. Literally. Together, with a phone or tablet and a few minutes a day, we can all take Climate Action Now.

Screenshots

Marine Debris Tracker4 screens
Climate Action Now4 screens

Verdict

The call

Marine Debris Tracker and Climate Action Now both sit at 5.0 stars, but that hides the real split: 97% of Climate Action Now's written reviews are positive against 39% of Marine Debris Tracker's. Climate Action Now also leads on ratings volume (168 vs 1) and update cadence (every 3 weeks vs every 2 months). Marine Debris Tracker's advantage is iOS requirement (12.4 vs 15.6). On price, rating, 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

On the App Store both sit at effectively the same score — 5.0 for Marine Debris Tracker against 4.9 for Climate Action Now. That said, the two scores are not equally well evidenced: Climate Action Now has 168 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 39% of Marine Debris Tracker's written reviews are positive against 97% of Climate Action Now's.

UpkeepUpdate frequency

Marine Debris Tracker ships an update every 2 months, Climate Action Now every 3 weeks. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.

Scorecard4 real differences · 6 level
Marine Debris Tracker versus Climate Action Now: the parameters behind the verdict, then further details
ParameterMarine Debris TrackerClimate Action Now
PriceFreeFree
Rating5.0 (1 ratings) — better4.9 (168 ratings)
Positive reviews38.9% of reviews96.7% of reviews — better
Number of ratings1168 — better
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.4 — better15.6
Further details — not scored
Size29 MB67 MB
Age rating4+4+
DeveloperKyle JohnsenClimate Action Now

Customer experience

Marine Debris Tracker

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews18 reviews
Positive38.9%
Neutral11.1%
Negative50.0%

Climate Action Now

All ratings168 ratings
Positive98.2%
Neutral1.2%
Negative0.6%
Written reviews61 reviews
Positive96.7%
Neutral1.6%
Negative1.6%

Bugs and requests

Marine Debris Tracker

Not enough reviews yet to summarise bugs or requests.

Climate Action Now

Reported bugs

4 issues
  • App takes too long to load
  • Error messages when sending emails
  • App assumes specific email client (e.g., Mail on iPhone)
  • App posts user actions publicly without easy opt-out

Requested features

4 requests
  • Option to turn off public posting of actions
  • More flexibility in email platform selection
  • Alternative to mandatory pronoun selection (e.g., 'other' option)
  • Less frequent donation requests

In-app purchases

None

Marine Debris Tracker

No in-app purchases

None

Climate Action Now

No in-app purchases

Questions

Is Marine Debris Tracker free?
Marine Debris Tracker is free to download, with no in-app purchases.
Is Climate Action Now free?
Climate Action Now is free to download, with no in-app purchases.
Which has better reviews, Marine Debris Tracker or Climate Action Now?
Marine Debris Tracker is rated higher. Marine Debris Tracker averages 5.0 out of 5 from 1 ratings, while Climate Action Now averages 4.9 from 168 ratings.
Do Marine Debris Tracker or Climate Action Now have ads?
Neither Marine Debris Tracker nor Climate Action Now shows ads.
Which is updated more often, Marine Debris Tracker or Climate Action Now?
Marine Debris Tracker ships an update every 2 months, and Climate Action Now every 3 weeks. Most recently, Marine Debris Tracker was updated on November 6, 2026 and Climate Action Now on November 7, 2026.

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