# Marine Debris Tracker vs D

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.

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

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

## The numbers

| Metric | Marine Debris Tracker | D |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/marine-debris-tracker/id432758761/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 38.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | — |
| Size | 29 MB | 15 MB |
| Requires iOS | **12.4** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kyle Johnsen](https://appshunter.io/developer/1021572657) | [Winkong Marine Engineering Co.,Ltd.](https://appshunter.io/developer/1602619555) |

## What reviewers say

### Marine Debris Tracker

[App page](https://appshunter.io/ios/app/marine-debris-tracker/id432758761)

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:** macOS Compatibility

**In-app purchases:** none


### D

[App page](https://appshunter.io/ios/app/d-vesselkeeper/id6677012335)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*