Comparison

Celer vs Booksum

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Celer

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
Read full description

Ever finish a page and realize you remember nothing? Read the same sentence three times and still lose your place? Celer was built for exactly that. Celer guides your eyes through the text with subtle highlighting, so your attention has a track to follow. Readers with ADHD and dyslexia tell us it's the difference between fighting a page and finishing it. HOW IT HELPS • Guided highlighting keeps your place — no more re-reading the same line • Adjustable pace: the text moves with you, not against you • Distraction-free reading screen, tuned for focus • Comprehension grows because your attention stays where the words are YOUR LIBRARY, YOUR WAY • Import EPUB, PDF, MOBI, RTF and TXT • Massive free classics library, ready to read • Follow articles and news with built-in RSS • Highlights and notes that stay with your books PRIVATE BY DESIGN No accounts required, no personal data collected. Your reading stays yours. Whether you have ADHD, dyslexia, or just a phone full of distractions, Celer helps you actually finish what you start. Try it free. Celer is an assistive reading tool, not a medical device or treatment. https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Booksum

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
Read full description

Introducing BookSum - Your Gateway to Knowledge and Quick Learning! Are you looking to boost your knowledge and personal growth but short on time? BookSum is here to help! We've crafted the ultimate app for busy individuals who crave valuable insights from the world's best nonfiction books in a fraction of the time. What You Get with BookSum: 1500+ Book Summaries: Dive into the core ideas of top nonfiction bestsellers in just minutes. Whether you prefer reading or listening, we've got you covered with concise summaries on a wide range of topics. Daily Microlearning Sessions: Start your day with bite-sized ideas that fit seamlessly into your routine. Fun and easy growth is just a tap away! Self-Growth Challenges: Elevate your life in areas like Success, Wealth, Healthy Relationships, Modern Parenting, Self-Confidence, Emotional Intelligence, and more. Set your goals and embark on a personalized 28-day journey to excellence. Highly Personalized Approach: Our content is tailored to your unique aspirations and needs, ensuring an engaging and fully customized learning experience. Proven Sources: We curate content from reputable lists such as The New York Times Bestsellers and Amazon Bestsellers, guaranteeing top-quality ideas. Quality Summaries: Our team of professional writers and editors meticulously craft key ideas to deliver the best learning experience. Spaced Repetition: Turn your favorite insights into flashcards for efficient memorization. Perfect for language learners, too! What Our Users Highlight: Inspiring & Motivating Extensive Library of Summaries Easy to Read & Listen Highly Recommended How It Works: Download BookSum and kickstart your growth journey with a free trial. If you love it, your subscription renews automatically, but you can cancel anytime. Your quest for knowledge and self-improvement begins here with BookSum! Terms of Use: https://booksum.ai/terms Privacy Policy: https://booksum.ai//privacy

Screenshots

Celer4 screens
Booksum4 screens

Verdict

The call

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 17.0). On price, in-app purchases, monetization model and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

Celer ships an update every 10 days, Booksum every 14 months. The most recent releases landed on September 21, 2026 and September 17, 2026 respectively.

Scorecard6 real differences · 4 level
Celer versus Booksum: the parameters behind the verdict, then further details
ParameterCelerBooksum
PriceFreeFree
Rating4.0 (21 ratings) — better1.0 (1 ratings)
Positive reviews57.1% of reviews — better0.0% of reviews
Number of ratings21 — better1
Update frequencyEvery 10 days — betterEvery 14 months
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.014.0 — better
Further details — not scored
Size62 MB61 MB
Age rating4+4+
DeveloperMobile Craft MB6Hive OU

Customer experience

Celer

All ratings21 ratings
Positive76.2%
Neutral0.0%
Negative23.8%
Written reviews14 reviews
Positive57.1%
Neutral0.0%
Negative42.9%

Booksum

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

4 purchases

Celer

Subscriptions4
  • Premium month$7.991 Month
  • Premium quarter$17.993 Months
  • Premium Year7 Days trial$34.991 Year
Show 1 more
  • Premium Year Plan$79.991 Year
1 purchases

Booksum

Subscriptions1
  • Yearly premium subscription7 Days trial$39.991 Year

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 10 days, and Booksum every 14 months. Most recently, Celer was updated on September 21, 2026 and Booksum on September 17, 2026.

Other comparisons