# Read Boost vs French21

The clearest difference is in-app purchases: Read Boost at none against French21's 1. French21's advantage is ads (none vs shown) and update cadence (every 5 days vs every 5 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. French21 sells 1 one-off in-app purchase. Read Boost asks for nothing beyond the download.

Read Boost ships an update every 5 months, French21 every 5 days. The most recent releases landed on October 9, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Read Boost | French21 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/read-boost/id6740498520/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 5 days** |
| Monetization | Ad-supported | — |
| Size | 13 MB | 435 MB |
| Requires iOS | **16.6** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jonathan Goldman](https://appshunter.io/developer/1774235948) | [OLE PETTER HAUGEN](https://appshunter.io/developer/1831337755) |

## What reviewers say

### Read Boost

[App page](https://appshunter.io/ios/app/read-boost/id6740498520)

This app uses AI to help you read faster and understand more. It offers adjustable reading speeds and tracks your progress to improve focus and comprehension. Ideal for students and professionals seeking a more efficient way to consume information.

**Highlights:** AI-powered text summarization, Adjustable reading speeds, Progress tracking, Optimized focus, Enhanced comprehension

**Features:** macOS Compatibility

**In-app purchases:** none


### French21

[App page](https://appshunter.io/ios/app/french21/id6752799461)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| French21 Pro | $19.99 | one-time |


## Frequently asked questions

### Is Read Boost free?

Read Boost is free to download, with no in-app purchases.

### Is French21 free?

French21 is free to download, with in-app purchases available.

### Do Read Boost or French21 have ads?

Read Boost shows ads; French21 does not.

### Which is updated more often, Read Boost or French21?

Read Boost ships an update every 5 months, and French21 every 5 days. Most recently, Read Boost was updated on October 9, 2026 and French21 on October 28, 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.*