# Soil Explorer vs Paired Comp

The clearest difference is update cadence: Paired Comp at every 10 days against Soil Explorer's every 11 months. On price, review sentiment, ads and in-app purchases 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, Paired Comp every 10 days. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Soil Explorer | Paired Comp |
| --- | --- | --- |
| 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 | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 10 days** |
| Monetization | Free | Free |
| Size | 172 MB | 11 MB |
| Requires iOS | 14.7 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Purdue University](https://appshunter.io/developer/371741257) | [Climb App](https://appshunter.io/developer/404048459) |

## 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


### Paired Comp

[App page](https://appshunter.io/ios/app/paired-comp/id1178541820)

This application facilitates evaluation experiments using the paired comparison method. Prepare your comparison targets as PDF files and conduct experiments on your iPad. It supports Thurstone's method and Scheffé's method for preference scaling.

**Highlights:** Conduct paired comparison experiments, Supports Thurstone's method, Supports Scheffé's method, Uses PDF files for comparison targets, iPad compatible

**Features:** 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 Paired Comp free?

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

### Do Soil Explorer or Paired Comp have ads?

Neither Soil Explorer nor Paired Comp shows ads.

### Which is updated more often, Soil Explorer or Paired Comp?

Soil Explorer ships an update every 11 months, and Paired Comp every 10 days. Most recently, Soil Explorer was updated on November 3, 2026 and Paired Comp on November 8, 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.*