# Corn Diseases vs Bayer Spray

The clearest difference is update cadence: Bayer Spray at monthly against Corn Diseases's every 15 months. Bayer Spray also leads on ratings volume (59 vs 1). Corn Diseases's advantage is rating (4.0 vs 3.8) and iOS requirement (8.1 vs 16.0). 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.

Corn Diseases holds the better App Store score, 4.0 against 3.8. That said, the two scores are not equally well evidenced: Bayer Spray has 59 ratings behind it against 1, so its average is the more settled of the two.

Corn Diseases ships an update every 15 months, Bayer Spray monthly. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Corn Diseases | Bayer Spray |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/corn-diseases/id1128686990/reviews)** | [3.8 (59 ratings)](https://appshunter.io/ios/app/bayer-spray/id1186046518/reviews) |
| Number of ratings | 1 | **59** |
| Positive reviews | — | 40.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Monthly** |
| Monetization | Free | Free |
| Size | 16 MB | 67 MB |
| Requires iOS | **8.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ag PhD](https://appshunter.io/developer/520210329) | [Bayer Group](https://appshunter.io/developer/480186736) |

## What reviewers say

### Corn Diseases

[App page](https://appshunter.io/ios/app/corn-diseases/id1128686990)

This app offers a comprehensive guide to common corn diseases found in the US and Canada. It focuses on practical, in-field diagnosis to help users identify and understand various crop ailments.

**Highlights:** Overview of US and Canada corn diseases, Emphasis on field diagnosis, Practical identification tools, Crop ailment information

**Features:** macOS Compatibility

**In-app purchases:** none


### Bayer Spray

[App page](https://appshunter.io/ios/app/bayer-spray/id1186046518)

This app assists farmers in planning agricultural spray applications. It provides field-specific weather forecasts, calculates erosion and runoff mitigation points based on EPA guidelines, and helps with mandatory recordkeeping for pesticide applications.

**Highlights:** Field-specific weather forecasts, Inversion risk assessment, Erosion/runoff mitigation calculator, EPA guideline compliance, Application recordkeeping, Dicamba recordkeeping support

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

**In-app purchases:** none


## Frequently asked questions

### Is Corn Diseases free?

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

### Is Bayer Spray free?

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

### Which has better reviews, Corn Diseases or Bayer Spray?

Corn Diseases is rated higher. Corn Diseases averages 4.0 out of 5 from 1 ratings, while Bayer Spray averages 3.8 from 59 ratings.

### Do Corn Diseases or Bayer Spray have ads?

Neither Corn Diseases nor Bayer Spray shows ads.

### Which is updated more often, Corn Diseases or Bayer Spray?

Corn Diseases ships an update every 15 months, and Bayer Spray monthly. Most recently, Corn Diseases was updated on October 24, 2026 and Bayer Spray on October 22, 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.*