# Corn Diseases vs Cognitive Development Society

The clearest difference is rating: Cognitive Development Society at 5.0 against Corn Diseases's 4.0. Cognitive Development Society also leads on update cadence (every 4 months vs every 15 months). Corn Diseases's advantage is monetization model (free vs ad-supported) and iOS requirement (8.1 vs 10.0). 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.

Cognitive Development Society holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Corn Diseases ships an update every 15 months, Cognitive Development Society every 4 months. The most recent releases landed on October 13, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Corn Diseases | Cognitive Development Society |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/corn-diseases/id1128686990/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cognitive-development-society/id1276276851/reviews)** |
| Number of ratings | 1 | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 4 months** |
| Monetization | **Free** | Ad-supported |
| Size | 16 MB | 86 MB |
| Requires iOS | **8.1** | 10.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 17+ |
| Developer | [Ag PhD](https://appshunter.io/developer/520210329) | [De Armond Management Ltd.](https://appshunter.io/developer/855315344) |

## 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


### Cognitive Development Society

[App page](https://appshunter.io/ios/app/cognitive-development-society/id1276276851)

This application provides details for a bi-ennial conference, including pre-conference workshops, plenary speakers, symposia, oral papers, and poster sessions. It outlines the schedule and content for the event.

**Highlights:** Conference schedule, Pre-conference workshops, Plenary speakers, Symposia details, Oral and poster sessions

**Features:** macOS Compatibility, Apple Watch app, 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 Cognitive Development Society free?

Cognitive Development Society is free to download, with no in-app purchases.

### Which has better reviews, Corn Diseases or Cognitive Development Society?

Cognitive Development Society is rated higher. Corn Diseases averages 4.0 out of 5 from 1 ratings, while Cognitive Development Society averages 5.0 from 1 ratings.

### Do Corn Diseases or Cognitive Development Society have ads?

Neither Corn Diseases nor Cognitive Development Society shows ads.

### Which is updated more often, Corn Diseases or Cognitive Development Society?

Corn Diseases ships an update every 15 months, and Cognitive Development Society every 4 months. Most recently, Corn Diseases was updated on October 13, 2026 and Cognitive Development Society on October 5, 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.*