# GDU Calculator vs YMS Lite

The clearest difference is rating: YMS Lite at 5.0 against GDU Calculator's 2.5. GDU Calculator's advantage is update cadence (every 6 weeks vs every 4 months) and iOS requirement (13.0 vs 15.1). On price, ratings volume, 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.

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

GDU Calculator ships an update every 6 weeks, YMS Lite every 4 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | GDU Calculator | YMS Lite |
| --- | --- | --- |
| 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/yms-lite/id1498978558/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 4 months |
| Monetization | Free | Free |
| Size | 57 MB | 36 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ag PhD](https://appshunter.io/developer/520210329) | [Dowdy Crop Innovations, LLC](https://appshunter.io/developer/1498978557) |

## 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

**In-app purchases:** none


### YMS Lite

[App page](https://appshunter.io/ios/app/yms-lite/id1498978558)

This application allows growers to input and view agricultural data offline. It syncs with a main system when an internet connection is available, offering a selection of core features.

**Highlights:** Offline data input, Offline data viewing, Syncs with main YMS system, Select core features, Internet required for sign-in

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is GDU Calculator free?

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

### Is YMS Lite free?

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

### Which has better reviews, GDU Calculator or YMS Lite?

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

### Do GDU Calculator or YMS Lite have ads?

Neither GDU Calculator nor YMS Lite shows ads.

### Which is updated more often, GDU Calculator or YMS Lite?

GDU Calculator ships an update every 6 weeks, and YMS Lite every 4 months. Most recently, GDU Calculator was updated on October 23, 2026 and YMS Lite on October 24, 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.*