# FieldX Sampling vs NDSU Nitrogen Calculator

The clearest difference is iOS requirement: NDSU Nitrogen Calculator at 8.0 against FieldX Sampling's 15.6. On price, update cadence, 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.

FieldX Sampling ships an update every 10 days, NDSU Nitrogen Calculator fortnightly. The most recent releases landed on October 21, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | FieldX Sampling | NDSU Nitrogen Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (5 ratings)](https://appshunter.io/ios/app/fieldx-sampling/id930155256/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 days** | Fortnightly |
| Monetization | Free | — |
| Size | 6 MB | 34 MB |
| Requires iOS | 15.6 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [FieldX Inc.](https://appshunter.io/developer/1480558229) | [North Dakota State University](https://appshunter.io/developer/493125863) |

## What reviewers say

### FieldX Sampling

[App page](https://appshunter.io/ios/app/fieldx-sampling/id930155256)

This app helps agricultural professionals collect soil samples in the field. It allows users to create and manage sampling points, navigate to locations, and log journal entries. The app supports offline use and integrates with desktop software for data management.

**Highlights:** Create and update sampling journal entries, Add, move, and delete sampling points, Navigate to sampling points with direction and distance, Mark sampling points as completed, Add new sampling points at GPS location, Work online or offline, Import/Export points from FieldX Office

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

**In-app purchases:** none


### NDSU Nitrogen Calculator

[App page](https://appshunter.io/ios/app/ndsu-nitrogen-calculator/id6444536816)

**In-app purchases:** none


## Frequently asked questions

### Is FieldX Sampling free?

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

### Is NDSU Nitrogen Calculator free?

NDSU Nitrogen Calculator is free to download, with no in-app purchases.

### Do FieldX Sampling or NDSU Nitrogen Calculator have ads?

Neither FieldX Sampling nor NDSU Nitrogen Calculator shows ads.

### Which is updated more often, FieldX Sampling or NDSU Nitrogen Calculator?

FieldX Sampling ships an update every 10 days, and NDSU Nitrogen Calculator fortnightly. Most recently, FieldX Sampling was updated on October 21, 2026 and NDSU Nitrogen Calculator on September 18, 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.*