Comparison

Marine Debris Tracker vs D

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

D

Features
Read full description

· Your digital assistant for ship management! It integrates features like BOSS dashboard, energy efficiency management, route optimization, Prognostics and Health Management, planned maintenance, smart warehousing, ship safety inspection, E-log, D-Knowledge, system management, crew management, and budget management. · A wealth of pre-configured information, integrating essential technical documents for a one-stop service product that's ready to use right away. · Utilizing technologies such as IoT, edge computing, AR, and AI to build a highly intelligent ship management platform. · Shore-ship data synchronization, transparent processes, real-time management of ship dynamics, balancing efficiency and management. · A free software solution for everyone, offering a management tool for mariners at no cost.

Screenshots

Marine Debris Tracker4 screens
D3 screens

Verdict

The call

Marine Debris Tracker and D are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 1, 2026 and October 25, 2026 respectively.

ScorecardNo meaningful differences
Marine Debris Tracker versus D: the parameters behind the verdict, then further details
ParameterMarine Debris TrackerD
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews38.9% of reviews—
Number of ratings1 — better—
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.4 — better13.0
Further details — not scored
Size29 MB15 MB
Age rating4+4+
DeveloperKyle JohnsenWinkong Marine Engineering Co.,Ltd.

In-app purchases

None

Marine Debris Tracker

No in-app purchases

None

D

No in-app purchases

Questions

Is Marine Debris Tracker free?
Marine Debris Tracker is free to download, with no in-app purchases.
Is D free?
D is free to download, with no in-app purchases.
Do Marine Debris Tracker or D have ads?
Neither Marine Debris Tracker nor D shows ads.
Which is updated more often, Marine Debris Tracker or D?
Marine Debris Tracker ships an update every 2 months, and D every 2 months. Most recently, Marine Debris Tracker was updated on November 1, 2026 and D on October 25, 2026.

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