# Read Boost vs Retent

The clearest difference is in-app purchases: Read Boost at none against Retent's 2. Retent's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 5 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Retent sells 2 in-app purchases, starting at $6.99 per month. Read Boost asks for nothing beyond the download.

Read Boost ships an update every 5 months, Retent every 2 weeks. The most recent releases landed on June 6, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Read Boost | Retent |
| --- | --- | --- |
| 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 2 weeks** |
| Monetization | Ad-supported | — |
| Size | 13 MB | 27 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [Jonathan Goldman](https://appshunter.io/developer/1774235948) | [Kristiyan Grigorov](https://appshunter.io/developer/1885305370) |

## 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


### Retent

[App page](https://appshunter.io/ios/app/retent-learn-and-remember/id6760609613)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Retent Unlimited Monthly | $6.99 | per month |
| Retent Unlimited Yearly | $39.99 | per year |


## Frequently asked questions

### Is Read Boost free?

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

### Is Retent free?

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

### Do Read Boost or Retent have ads?

Read Boost shows ads; Retent does not.

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

Read Boost ships an update every 5 months, and Retent every 2 weeks. Most recently, Read Boost was updated on June 6, 2026 and Retent on September 29, 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.*