# Celer vs Booksum

The clearest difference is review sentiment: Celer at 57% against Booksum's 0%. Celer also leads on rating (4.0 vs 1.0) and ads (none vs shown). Booksum's advantage is iOS requirement (14.0 vs 18.0). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. Celer sells 4 in-app purchases, starting at $7.99 per month and Booksum sells 1 in-app purchase, starting at $39.99 per year. Whichever you choose, the download price is not the number that matters.

Celer holds the better App Store score, 4.0 against 1.0. That said, the two scores are not equally well evidenced: Celer has 21 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 57% of Celer's written reviews are positive against 0% of Booksum's.

Celer ships an update every 9 days, Booksum every 14 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Celer | Booksum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (21 ratings)](https://appshunter.io/ios/app/celer-adhd-and-focus-reader/id1641298256/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/booksum-speed-reading/id6474775671/reviews) |
| Number of ratings | **21** | 1 |
| Positive reviews | **57.1% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 9 days** | Every 14 months |
| Monetization | Freemium | Free with in-app purchases |
| Size | 115 MB | 61 MB |
| Requires iOS | 18.0 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mobile Craft MB](https://appshunter.io/developer/1299128266) | [6Hive OU](https://appshunter.io/developer/1537357804) |

## What reviewers say

### Celer

[App page](https://appshunter.io/ios/app/celer-adhd-and-focus-reader/id1641298256)

Enhance your reading speed, focus, and comprehension with a scientifically-backed method. This app offers an immersive environment and assistive technology to help you absorb information faster and retain it better. It's an essential tool for students, professionals, and individuals with neurodivergent reading needs.

**Highlights:** Read 2-3x faster, Sharpen focus with immersive environment, Boost memory and retention, Assistive tool for ADHD & Dyslexia, Import EPUB, PDF, mobi, rtf, txt, Read articles and web content, Customizable themes

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium month | $7.99 | per month |
| Premium quarter | $17.99 | per 3 months |
| Premium Year | $34.99 | per year |
| Premium Year Plan | $79.99 | per year |


### Booksum

[App page](https://appshunter.io/ios/app/booksum-speed-reading/id6474775671)

Access over 1500 concise summaries of nonfiction bestsellers to quickly gain knowledge and personal growth. Engage in daily microlearning sessions and personalized 28-day self-growth challenges. Turn key insights into flashcards for efficient memorization.

**Highlights:** 1500+ book summaries, Daily microlearning sessions, 28-day self-growth challenges, Personalized learning approach, Spaced repetition flashcards, Content from bestseller lists

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly premium subscription | $39.99 | per year |


## Frequently asked questions

### Is Celer free?

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

### Is Booksum free?

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

### Which has better reviews, Celer or Booksum?

Celer is rated higher. Celer averages 4.0 out of 5 from 21 ratings, while Booksum averages 1.0 from 1 ratings.

### Do Celer or Booksum have ads?

Booksum shows ads; Celer does not.

### Which is updated more often, Celer or Booksum?

Celer ships an update every 9 days, and Booksum every 14 months. Most recently, Celer was updated on October 24, 2026 and Booksum on October 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.*