Comparison

ReadMe! (Spritz & BeeLine) vs Celer

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

Head to head
About

ReadMe! (Spritz & BeeLine)

This app enhances your reading experience with unique technologies like Focused Reading and BeeLine Reader, designed to improve speed and fluency. It supports EPUB, PDF, DOCX, and TXT files, with optional cross-device syncing and premium features available via subscription.

Highlights
  • Read EPUB, PDF, DOCX, TXT files
  • Focused Reading mode
  • BeeLine Reader for speed and fluency
  • Multi-device syncing
  • Cross-device synchronization
Features
Read full description

ReadMe! has helped readers find their pace and place since 2014. v2 is the biggest ReadMe! update yet: a rebuilt reader, a calmer library, and four focused ways to move through a book. FOUR WAYS TO READ • Spritz presents one word at a time around a fixed red focal letter, with precise speed control. • BeeLine guides your eyes through each rendered line with continuous color gradients. • Focus builds a readable trail of recent words so attention can settle without losing context. • Read Along carries the text through a smooth, centered ticker. A FULLY UNLOCKED SAMPLE Open the built-in sample and try every reading mode, control, and setting for as long as you like. No account or subscription is required. YOUR BOOKS STAY READABLE Import supported books and documents, keep them in your local library, and read them normally for free. Each imported book includes 3 active minutes to try ReadMe!'s focused reading modes. The timer runs only while a Premium mode is actively playing. When the preview ends, your book stays open at the same place and remains readable normally. PREMIUM, WITHOUT LOCKING YOUR LIBRARY Premium unlocks unlimited Spritz, BeeLine, Focus, and Read Along use with your imported books. It does not take away normal reading, imports, bookmarks, or your local library. LIFETIME STILL MEANS LIFETIME Existing Lifetime Premium buyers retain full access to all current and future Premium features. Restore through Settings or the Preview complete screen. If automatic restoration cannot find your purchase, ReadMe! support will help. SYNC WHEN YOU CHOOSE An account is optional. Sign in with Apple, Facebook, or email when you want cloud library sync. On-device v1 books migrate locally with bookmarks and reading position, and the new sync system stores exact reading anchors instead of an approximate percentage alone. Subscriptions are available monthly and yearly. ReadMe! shows the exact localized price and duration before purchase. Payment is charged to your Apple Account at confirmation. A subscription renews automatically unless canceled at least 24 hours before the end of the current period. Your Apple Account is charged for renewal within 24 hours before that period ends. Manage or cancel in Apple Account subscription settings. Privacy Policy: https://v2.readmei.com/privacy.php Terms of Use: https://v2.readmei.com/terms.php Support: https://v2.readmei.com/support.php

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/

Screenshots

ReadMe! (Spritz & BeeLine)4 screens
Celer4 screens

Verdict

The call

The clearest difference is rating: Celer at 4.0 against ReadMe! (Spritz & BeeLine)'s 3.7. Celer also leads on review sentiment (57% vs 43%) and update cadence (every 10 days vs every 4 weeks). On price, ads, in-app purchases and monetization model 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. ReadMe! (Spritz & BeeLine) sells 5 in-app purchases, starting at $1.99 per month and Celer sells 4 in-app purchases, starting at $7.99 per month. 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 3.7. That said, the two scores are not equally well evidenced: Celer has 21 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 43% of ReadMe! (Spritz & BeeLine)'s written reviews are positive against 57% of Celer's.

UpkeepUpdate frequency

ReadMe! (Spritz & BeeLine) ships an update every 4 weeks, Celer every 10 days. The most recent releases landed on September 24, 2026 and September 21, 2026 respectively.

Scorecard4 real differences · 6 level
ReadMe! (Spritz & BeeLine) versus Celer: the parameters behind the verdict, then further details
ParameterReadMe! (Spritz & BeeLine)Celer
PriceFreeFree
Rating3.7 (3 ratings)4.0 (21 ratings) — better
Positive reviews43.2% of reviews57.1% of reviews — better
Number of ratings321 — better
Update frequencyEvery 4 weeksEvery 10 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size104 MB62 MB
Age rating4+4+
DeveloperSpritz Holding LLCMobile Craft MB

Customer experience

ReadMe! (Spritz & BeeLine)

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews190 reviews
Positive43.2%
Neutral13.2%
Negative43.7%

Celer

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

Bugs and requests

ReadMe! (Spritz & BeeLine)

Reported bugs

4 issues
  • Spritz reader not working properly
  • App freezes when adding books
  • Sync issues across devices
  • Compatibility problems with certain ebook formats

Requested features

5 requests
  • Offline reading mode
  • Annotation and note-taking capabilities
  • Better library management and organization
  • Integration with other ebook platforms
  • Customizable reading speed controls

Celer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

5 purchases

ReadMe! (Spritz & BeeLine)

Subscriptions4
  • Synchronisation Service$1.991 Month
  • Premium (Monthly)$3.991 Month
  • Synchronisation Service$19.991 Year
Show 1 more
  • Premium (Yearly)$39.991 Year
One-time1
  • Lifetime Premium$99.99
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

Questions

Is ReadMe! (Spritz & BeeLine) free?
ReadMe! (Spritz & BeeLine) is free to download, with in-app purchases available.
Is Celer free?
Celer is free to download, with in-app purchases available.
Which has better reviews, ReadMe! (Spritz & BeeLine) or Celer?
Celer is rated higher. ReadMe! (Spritz & BeeLine) averages 3.7 out of 5 from 3 ratings, while Celer averages 4.0 from 21 ratings.
Do ReadMe! (Spritz & BeeLine) or Celer have ads?
Neither ReadMe! (Spritz & BeeLine) nor Celer shows ads.
Which is updated more often, ReadMe! (Spritz & BeeLine) or Celer?
ReadMe! (Spritz & BeeLine) ships an update every 4 weeks, and Celer every 10 days. Most recently, ReadMe! (Spritz & BeeLine) was updated on September 24, 2026 and Celer on September 21, 2026.

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