# Main Idea vs Readability

The clearest difference is price: Readability at Free against Main Idea's $6.99. Readability also leads on ratings volume (24K vs 6) and update cadence (fortnightly vs every 3 months). Main Idea's advantage is in-app purchases (none vs 2) and review sentiment (85% vs 56%). On ads and device support there is nothing between them.

Readability is free to download; Main Idea costs $6.99 up front. Readability sells 2 in-app purchases, starting at $19.99 per month. Main Idea asks for nothing beyond the download.

Readability holds the better App Store score, 4.6 against 4.3. That said, the two scores are not equally well evidenced: Readability has 24K ratings behind it against 6, so its average is the more settled of the two. Written reviews complicate that: 85% of Main Idea's written reviews are positive against 56% of Readability's, so the app with the better star average is not the one people write more warmly about.

Main Idea ships an update every 3 months, Readability fortnightly. The most recent releases landed on September 8, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Main Idea | Readability |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Rating | [4.3 (6 ratings)](https://appshunter.io/ios/app/main-ideasentences/id895686005/reviews) | **[4.6 (24K ratings)](https://appshunter.io/ios/app/readability-learn-to-read/id1477213383/reviews)** |
| Number of ratings | 6 | **24K** |
| Positive reviews | **84.6% of reviews** | 55.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | **Paid** | Subscription |
| Best chart rank | — | **#186** |
| Size | 22 MB | 264 MB |
| Requires iOS | **12.2** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Janine Toole](https://appshunter.io/developer/839832427) | [e4site Inc.](https://appshunter.io/developer/1477213382) |

## What reviewers say

### Main Idea

[App page](https://appshunter.io/ios/app/main-ideasentences/id895686005)

This app helps children in grades 2-5 improve their reading comprehension by teaching them to identify the main idea of sentences. It uses a fun, game-like environment with step-by-step learning and a reward system to keep kids motivated.

**Highlights:** Step-by-step skill building, Incremental learning with unlocked levels, Frustration-free guided learning, Engaging reward center, Parental review and reporting, Over 600 examples, Timed levels for fluency

**Features:** macOS Compatibility

**In-app purchases:** none


### Readability

[App page](https://appshunter.io/ios/app/readability-learn-to-read/id1477213383)

**Currently charting:** #186 Top Grossing · Education (US App Store)

This app uses AI-powered voice technology to provide personalized reading tutoring for children. It listens as kids read aloud, offers pronunciation correction, and assesses comprehension through interactive questions. The app also builds vocabulary and allows parents to track progress.

**Highlights:** AI-powered voice recognition for reading practice, Real-time pronunciation correction, Interactive voice-based comprehension questions, Personalized vocabulary lists, Parent dashboard for progress tracking, Engaging grade-level stories with illustrations

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Readability Tutor | $19.99 | per month |
| Readability Tutor Annual | $139.99 | per year |

**What reviewers like**

- 👍 Helpful for struggling readers
- 🚀 Improves reading fluency
- 💡 Engaging for kids
- 👍 Useful data and progress tracking

**What reviewers complain about**

- 🐛 Voice recognition issues
- 🐛 Inaccurate comprehension tests
- 💰 Expensive subscription
- 🐛 Glitchy performance

**Reported bugs**

- App charges for free trial
- Subscription cancellation issues
- Inconsistent app behavior
- Compatibility problems on some devices

**Requested features**

- More customization options for text and background
- Improved voice recognition accuracy
- Expanded book selection
- Better comprehension testing


## Frequently asked questions

### Is Main Idea free?

Main Idea costs $6.99, with no in-app purchases.

### Is Readability free?

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

### Which has better reviews, Main Idea or Readability?

Readability is rated higher. Main Idea averages 4.3 out of 5 from 6 ratings, while Readability averages 4.6 from 24K ratings.

### Do Main Idea or Readability have ads?

Neither Main Idea nor Readability shows ads.

### Which is updated more often, Main Idea or Readability?

Main Idea ships an update every 3 months, and Readability fortnightly. Most recently, Main Idea was updated on September 8, 2026 and Readability on September 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.*