# CDMS Vision vs GDU Calculator

The clearest difference is rating: CDMS Vision at 3.5 against GDU Calculator's 2.5. GDU Calculator's advantage is update cadence (every 6 weeks vs every 34 months) and ratings volume (11 vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.

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

CDMS Vision holds the better App Store score, 3.5 against 2.5. That said, the two scores are not equally well evidenced: GDU Calculator has 11 ratings behind it against 2, so its average is the more settled of the two.

CDMS Vision ships an update every 34 months, GDU Calculator every 6 weeks. The most recent releases landed on October 9, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | CDMS Vision | GDU Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (2 ratings)](https://appshunter.io/ios/app/cdms-vision/id608619803/reviews)** | [2.5 (11 ratings)](https://appshunter.io/ios/app/gdu-calculator/id850528308/reviews) |
| Number of ratings | 2 | **11** |
| Positive reviews | — | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 34 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 2 MB | 57 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Crop Data Management Systems, Inc.](https://appshunter.io/developer/472297919) | [Ag PhD](https://appshunter.io/developer/520210329) |

## What reviewers say

### CDMS Vision

[App page](https://appshunter.io/ios/app/cdms-vision/id608619803)

Manage and present crop plans on a mobile platform. This tool is designed for agricultural professionals to organize and visualize their farming strategies.

**Highlights:** Crop plan management, Presentation tools, Mobile platform, Agricultural planning

**In-app purchases:** none


### 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

**In-app purchases:** none


## Frequently asked questions

### Is CDMS Vision free?

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

### Is GDU Calculator free?

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

### Which has better reviews, CDMS Vision or GDU Calculator?

CDMS Vision is rated higher. CDMS Vision averages 3.5 out of 5 from 2 ratings, while GDU Calculator averages 2.5 from 11 ratings.

### Do CDMS Vision or GDU Calculator have ads?

Neither CDMS Vision nor GDU Calculator shows ads.

### Which is updated more often, CDMS Vision or GDU Calculator?

CDMS Vision ships an update every 34 months, and GDU Calculator every 6 weeks. Most recently, CDMS Vision was updated on October 9, 2026 and GDU Calculator on October 21, 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.*