# Soil Explorer vs UWSP SPIN

The clearest difference is update cadence: UWSP SPIN at every 4 weeks against Soil Explorer's every 11 months. Soil Explorer's advantage is iOS requirement (14.7 vs 17.4). On price, ads, in-app purchases and device support there is nothing between them.

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

Soil Explorer ships an update every 11 months, UWSP SPIN every 4 weeks. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Soil Explorer | UWSP SPIN |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (9 ratings)](https://appshunter.io/ios/app/soil-explorer/id996159565/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 4 weeks** |
| Monetization | Free | — |
| Size | 172 MB | 78 MB |
| Requires iOS | **14.7** | 17.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Purdue University](https://appshunter.io/developer/371741257) | [University of Wisconsin - Stevens Point](https://appshunter.io/developer/923021660) |

## What reviewers say

### Soil Explorer

[App page](https://appshunter.io/ios/app/soil-explorer/id996159565)

Discover detailed soil property and landscape maps for U.S. states and global soil distributions. Understand how map features relate to real-world observations. This educational tool uses data from USDA and USGS to illustrate complex soil-landscape relationships.

**Highlights:** Detailed soil property maps, Landscape visualizations, Global soil distribution maps, Field observation correlation, USDA NRCS data integration, USGS data integration

**Features:** Vision Pro support

**In-app purchases:** none


### UWSP SPIN

[App page](https://appshunter.io/ios/app/uwsp-spin/id6740767676)

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

**In-app purchases:** none


## Frequently asked questions

### Is Soil Explorer free?

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

### Is UWSP SPIN free?

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

### Do Soil Explorer or UWSP SPIN have ads?

Neither Soil Explorer nor UWSP SPIN shows ads.

### Which is updated more often, Soil Explorer or UWSP SPIN?

Soil Explorer ships an update every 11 months, and UWSP SPIN every 4 weeks. Most recently, Soil Explorer was updated on October 24, 2026 and UWSP SPIN on October 28, 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.*