# Main Idea vs I.S. 313

The clearest difference is review sentiment: Main Idea at 42% against I.S. 313's 0%. Main Idea also leads on iOS requirement (12.2 vs 15.6). I.S. 313's advantage is in-app purchases (none vs 3) and update cadence (every 2 months vs every 22 months). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Main Idea sells 3 one-off in-app purchases. I.S. 313 asks for nothing beyond the download.

I.S. 313 holds the better App Store score, 4.0 against 3.7. Both are backed by a comparable volume of ratings — 3 and 3 respectively. Written reviews complicate that: 42% of Main Idea's written reviews are positive against 0% of I.S. 313's, so the app with the better star average is not the one people write more warmly about.

Main Idea ships an update every 22 months, I.S. 313 every 2 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Main Idea | I.S. 313 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/main-idea-short-texts/id916386000/reviews) | **[4.0 (3 ratings)](https://appshunter.io/ios/app/is-313/id6464086047/reviews)** |
| Number of ratings | 3 | 3 |
| Positive reviews | **41.7% of reviews** | 0.0% 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 | 164 MB |
| Requires iOS | **12.2** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Janine Toole](https://appshunter.io/developer/839832427) | [Solved Education Consultancy, LLC](https://appshunter.io/developer/1506645558) |

## 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 |


### I.S. 313

[App page](https://appshunter.io/ios/app/is-313/id6464086047)

This app provides students, families, and educators with direct access to academic schedules, grades, learning materials, and school announcements. It offers multilingual support and integrates school social platforms for a unified educational experience.

**Highlights:** Academic schedule access, Real-time grade tracking, Learning material access, School announcements and notifications, Parent-Teacher Association updates, Multilingual support (100+ languages), Integration with educational platforms

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

**In-app purchases:** none


## Frequently asked questions

### Is Main Idea free?

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

### Is I.S. 313 free?

I.S. 313 is free to download, with no in-app purchases.

### Which has better reviews, Main Idea or I.S. 313?

I.S. 313 is rated higher. Main Idea averages 3.7 out of 5 from 3 ratings, while I.S. 313 averages 4.0 from 3 ratings.

### Do Main Idea or I.S. 313 have ads?

Neither Main Idea nor I.S. 313 shows ads.

### Which is updated more often, Main Idea or I.S. 313?

Main Idea ships an update every 22 months, and I.S. 313 every 2 months. Most recently, Main Idea was updated on October 24, 2026 and I.S. 313 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.*