# 速読診断｜読解力テスト vs Cortex

The clearest difference is in-app purchases: 速読診断｜読解力テスト at none against Cortex's 3. 速読診断｜読解力テスト also leads on ads (none vs shown) and device support (3 vs 1). Cortex's advantage is update cadence (every 5 days vs every 2 months). On price and iOS requirement there is nothing between them.

Both are free to download. Cortex sells 3 in-app purchases, starting at $6.99 per month. 速読診断｜読解力テスト asks for nothing beyond the download.

速読診断｜読解力テスト ships an update every 2 months, Cortex every 5 days. The most recent releases landed on October 30, 2026 and November 13, 2026 respectively.

## The numbers

| Metric | 速読診断｜読解力テスト | Cortex |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 5 days** |
| Size | 18 MB | 87 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [sheeplab LLC](https://appshunter.io/developer/1802534863) | [Dmitry Afanasyev](https://appshunter.io/developer/1788884993) |

## What reviewers say

### 速読診断｜読解力テスト

[App page](https://appshunter.io/ios/app/id6751850036)

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

**In-app purchases:** none


### Cortex

[App page](https://appshunter.io/ios/app/cortex-ai-focus-timer/id6759869031)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AI Focus Timer Premium | $6.99 | per month |
| AI Focus Timer Premium | $49.99 | per year |
| AI Focus Timer Lifetime | $99.99 | one-time |


## Frequently asked questions

### Is 速読診断｜読解力テスト free?

速読診断｜読解力テスト is free to download, with no in-app purchases.

### Is Cortex free?

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

### Do 速読診断｜読解力テスト or Cortex have ads?

Cortex shows ads; 速読診断｜読解力テスト does not.

### Which is updated more often, 速読診断｜読解力テスト or Cortex?

速読診断｜読解力テスト ships an update every 2 months, and Cortex every 5 days. Most recently, 速読診断｜読解力テスト was updated on October 30, 2026 and Cortex on November 13, 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.*