# Main Idea vs Sort By Kind

The clearest difference is rating: Sort By Kind at 4.4 against Main Idea's 3.7. Sort By Kind also leads on in-app purchases (none vs 3) and review sentiment (75% vs 42%). Main Idea's advantage is device support (3 vs 1). On price, ratings volume and ads there is nothing between them.

Both are free to download. Main Idea sells 3 one-off in-app purchases. Sort By Kind asks for nothing beyond the download.

Sort By Kind holds the better App Store score, 4.4 against 3.7. Both are backed by a comparable volume of ratings — 3 and 7 respectively. Written reviews point the same way: 42% of Main Idea's written reviews are positive against 75% of Sort By Kind's.

Main Idea ships an update every 22 months, Sort By Kind every 2 months. Both last shipped on November 2, 2026.

## The numbers

| Metric | Main Idea | Sort By Kind |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/main-idea-short-texts/id916386000/reviews) | **[4.4 (7 ratings)](https://appshunter.io/ios/app/sort-by-kind-sort-visually-related-items/id1135864577/reviews)** |
| Number of ratings | 3 | **7** |
| Positive reviews | 41.7% of reviews | **75.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 22 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 28 MB | 77 MB |
| Requires iOS | 12.2 | **7.0** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Janine Toole](https://appshunter.io/developer/839832427) | [STEP BY STEP](https://appshunter.io/developer/961412234) |

## What reviewers say

### Main Idea

[App page](https://appshunter.io/ios/app/main-idea-short-texts/id916386000)

This app helps children in grades 2-5 improve their reading comprehension by teaching them to identify the main idea of a text. It uses a step-by-step, errorless learning approach with a reward system to keep kids motivated. Content is designed by educators and researchers, with reporting features for parents and teachers.

**Highlights:** Step-by-step skill building, Errorless learning approach, Engaging reward center, Parental review and reporting, Teacher and researcher-designed content, Timed levels for fluency

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to 2 Players | $1.99 | one-time |
| Purchase All Levels | $2.99 | one-time |
| Upgrade to 10 Players | $2.99 | one-time |


### Sort By Kind

[App page](https://appshunter.io/ios/app/sort-by-kind-sort-visually-related-items/id1135864577)

This educational app helps children aged 2 and up develop visual perception, cognitive, and language skills through fun sorting activities. It offers a simple, distraction-free learning environment designed to enhance critical thinking and problem-solving abilities.

**Highlights:** Visual item sorting activities, Develops visual perception, Enhances cognitive skills, Improves language skills, Progress tracking for educators, Accessibility features for users with disabilities

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Main Idea free?

Main Idea is free to download, with in-app purchases available.

### Is Sort By Kind free?

Sort By Kind is free to download, with no in-app purchases.

### Which has better reviews, Main Idea or Sort By Kind?

Sort By Kind is rated higher. Main Idea averages 3.7 out of 5 from 3 ratings, while Sort By Kind averages 4.4 from 7 ratings.

### Do Main Idea or Sort By Kind have ads?

Neither Main Idea nor Sort By Kind shows ads.

### Which is updated more often, Main Idea or Sort By Kind?

Main Idea ships an update every 22 months, and Sort By Kind every 2 months. Most recently, Main Idea was updated on November 2, 2026 and Sort By Kind 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.*