# GDU Calculator vs NSPro

The clearest difference is rating: NSPro at 4.5 against GDU Calculator's 2.5. GDU Calculator's advantage is review sentiment (25% vs 0%) and iOS requirement (13.0 vs 15.6). On price, ratings volume, update cadence and ads there is nothing between them.

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

NSPro holds the better App Store score, 4.5 against 2.5. Both are backed by a comparable volume of ratings — 11 and 4 respectively. Written reviews complicate that: 25% of GDU Calculator's written reviews are positive against 0% of NSPro's, so the app with the better star average is not the one people write more warmly about.

GDU Calculator ships an update every 6 weeks, NSPro every 2 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | GDU Calculator | NSPro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (11 ratings)](https://appshunter.io/ios/app/gdu-calculator/id850528308/reviews) | **[4.5 (4 ratings)](https://appshunter.io/ios/app/nspro/id1077550685/reviews)** |
| Number of ratings | **11** | 4 |
| Positive reviews | **25.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Free | Free |
| Size | 57 MB | 22 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | +4 | 4+ |
| Developer | [Ag PhD](https://appshunter.io/developer/520210329) | [Nutrien AG Solutions, Inc.](https://appshunter.io/developer/516392831) |

## What reviewers say

### GDU Calculator

[App page](https://appshunter.io/ios/app/gdu-calculator/id850528308)

This app helps corn and wheat growers calculate Growing Degree Units (GDUs) for their crops. It provides daily temperature and GDU data, and can send push notifications about potential field issues based on crop growth stages.

**Highlights:** Growing Degree Unit calculation, Corn and wheat crop support, Day-by-day temperature data, Push notifications for field issues, Crop growth stage tracking

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

**In-app purchases:** none


### NSPro

[App page](https://appshunter.io/ios/app/nspro/id1077550685)

This app provides an interactive dashboard for agronomists to analyze soil, tissue, and water samples. It offers historical data access and custom report building to help understand nutrient issues. Access requires an assigned login.

**Highlights:** Soil, tissue, and water sample analysis, Interactive nutrient issue dashboard, Historical sample data access, Custom report building, Web and app access

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

**In-app purchases:** none


## Frequently asked questions

### Is GDU Calculator free?

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

### Is NSPro free?

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

### Which has better reviews, GDU Calculator or NSPro?

NSPro is rated higher. GDU Calculator averages 2.5 out of 5 from 11 ratings, while NSPro averages 4.5 from 4 ratings.

### Do GDU Calculator or NSPro have ads?

Neither GDU Calculator nor NSPro shows ads.

### Which is updated more often, GDU Calculator or NSPro?

GDU Calculator ships an update every 6 weeks, and NSPro every 2 months. Most recently, GDU Calculator was updated on November 1, 2026 and NSPro on November 2, 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.*