# SeagrassSpotter vs VSD Viewer & MindMap Maker

The clearest difference is in-app purchases: SeagrassSpotter at none against VSD Viewer & MindMap Maker's 3. SeagrassSpotter also leads on iOS requirement (13.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. VSD Viewer & MindMap Maker sells 3 in-app purchases, starting at $7.99 per month. SeagrassSpotter asks for nothing beyond the download.

SeagrassSpotter ships an update every 4 months, VSD Viewer & MindMap Maker every 2 months. The most recent releases landed on November 2, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | SeagrassSpotter | VSD Viewer & MindMap Maker |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 40 MB | 6 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Project Seagrass](https://appshunter.io/developer/1778220617) | [Tu Anh Do](https://appshunter.io/developer/738947045) |

## What reviewers say

### SeagrassSpotter

[App page](https://appshunter.io/ios/app/seagrassspotter/id1122588337)

Contribute to global seagrass conservation by reporting your sightings. Your data helps researchers understand seagrass meadows, their distribution, and threats, enabling targeted conservation efforts worldwide.

**Highlights:** Citizen science contributions, Global seagrass monitoring, Data for conservation action, Distribution and range mapping, Threat identification

**Features:** macOS Compatibility

**In-app purchases:** none


### VSD Viewer & MindMap Maker

[App page](https://appshunter.io/ios/app/vsd-viewer-and-mindmap-maker/id6775379923)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MindMap Premium Monthly | $7.99 | per month |
| MindMap Premium Yearly | $29.99 | per year |
| Mindmap Premium Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is SeagrassSpotter free?

SeagrassSpotter is free to download, with no in-app purchases.

### Is VSD Viewer & MindMap Maker free?

VSD Viewer & MindMap Maker is free to download, with in-app purchases available.

### Do SeagrassSpotter or VSD Viewer & MindMap Maker have ads?

Neither SeagrassSpotter nor VSD Viewer & MindMap Maker shows ads.

### Which is updated more often, SeagrassSpotter or VSD Viewer & MindMap Maker?

SeagrassSpotter ships an update every 4 months, and VSD Viewer & MindMap Maker every 2 months. Most recently, SeagrassSpotter was updated on November 2, 2026 and VSD Viewer & MindMap Maker on November 10, 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.*