# Readability vs Granton SD

The clearest difference is in-app purchases: Granton SD at none against Readability's 2. Readability's advantage is update cadence (fortnightly vs every 13 months) and chart position (#165 vs unranked). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Readability sells 2 in-app purchases, starting at $19.99 per month. Granton SD asks for nothing beyond the download.

Readability ships an update fortnightly, Granton SD every 13 months. The most recent releases landed on October 17, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Readability | Granton SD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (25K ratings)](https://appshunter.io/ios/app/readability-learn-to-read/id1477213383/reviews)** | — |
| Number of ratings | **25K** | — |
| Positive reviews | 55.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 13 months |
| Monetization | Subscription | — |
| Best chart rank | **#165** | — |
| Size | 282 MB | 38 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [e4site Inc.](https://appshunter.io/developer/1477213382) | [CESA 6](https://appshunter.io/developer/1735831454) |

## What reviewers say

### Readability

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

**Currently charting:** #165 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


### Granton SD

[App page](https://appshunter.io/ios/app/granton-sd/id6749694218)

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

**In-app purchases:** none


## Frequently asked questions

### Is Readability free?

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

### Is Granton SD free?

Granton SD is free to download, with no in-app purchases.

### Do Readability or Granton SD have ads?

Neither Readability nor Granton SD shows ads.

### Which is updated more often, Readability or Granton SD?

Readability ships an update fortnightly, and Granton SD every 13 months. Most recently, Readability was updated on October 17, 2026 and Granton SD on October 1, 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.*