# GDU Calculator vs Smithfield Grain

The clearest difference is rating: Smithfield Grain at 5.0 against GDU Calculator's 2.5. GDU Calculator's advantage is iOS requirement (13.0 vs 16.0). 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.

Smithfield Grain holds the better App Store score, 5.0 against 2.5. Both are backed by a comparable volume of ratings — 11 and 4 respectively.

Both ship on a similar rhythm, roughly every 6 weeks. The most recent releases landed on November 4, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | GDU Calculator | Smithfield Grain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (11 ratings)](https://appshunter.io/ios/app/gdu-calculator/id850528308/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/smithfield-grain/id1427852548/reviews)** |
| Number of ratings | **11** | 4 |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | Every 6 weeks |
| Monetization | Free | Free |
| Size | 57 MB | 5 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | +4 | 4+ |
| Developer | [Ag PhD](https://appshunter.io/developer/520210329) | [Smithfield Foods, Inc.](https://appshunter.io/developer/597969102) |

## 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


### Smithfield Grain

[App page](https://appshunter.io/ios/app/smithfield-grain/id1427852548)

Access real-time harvest data and manage your grain facility operations directly from your mobile device. This app offers tools for signing contracts, viewing cash bids, futures, scale tickets, and commodity balances to help growers save time and maximize profits.

**Highlights:** Real-time harvest information, eSign contracts, View cash bids, Access futures data, Manage scale tickets, Track commodity balances, View settlement information

**In-app purchases:** none


## Frequently asked questions

### Is GDU Calculator free?

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

### Is Smithfield Grain free?

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

### Which has better reviews, GDU Calculator or Smithfield Grain?

Smithfield Grain is rated higher. GDU Calculator averages 2.5 out of 5 from 11 ratings, while Smithfield Grain averages 5.0 from 4 ratings.

### Do GDU Calculator or Smithfield Grain have ads?

Neither GDU Calculator nor Smithfield Grain shows ads.

### Which is updated more often, GDU Calculator or Smithfield Grain?

GDU Calculator ships an update every 6 weeks, and Smithfield Grain every 6 weeks. Most recently, GDU Calculator was updated on November 4, 2026 and Smithfield Grain 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.*