Comparison

Caff vs Readerr

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

Head to head
About

Caff

Features
Read full description

Caff is a speed reader for your own EPUB books. It shows one word at a time, right where your eyes already rest, so you can read faster without losing your place — or your comprehension. Each word is anchored on its optimal recognition point and tinted at the center, so your eyes stop darting across the page and simply take the words in. Choose a pace that suits the moment, anywhere from a gentle 100 words a minute to a brisk 1000, and let the book come to you. Import any EPUB from Files, and Caff remembers exactly where you stopped in every book. HOW IT FEELS - Tap the center to play or pause - Tap left or right to step back or forward a word - Press and hold an edge to scrub through the book - Swipe to jump a sentence at a time MADE TO FIT YOU - Reading speed from 100 to 1000 words per minute - Adjustable word size and seven focus-point colors - Dark, Light, and Sepia themes - A sleep timer that pauses reading for you - Turn sideways to see the words on either side for extra context FIND YOUR PLACE - Bookmarks, a table of contents, and full-text search - Step back and forward through everywhere you've jumped - Your position is saved automatically, book by book PRIVATE BY DESIGN - Your books and your reading stay entirely on your device. No account, no tracking, nothing to sign up for. Caff turns the reading list you keep meaning to finish into one you actually do.

About

Readerr

This app helps you read faster and understand more by displaying text one word at a time. It uses a unique highlighting technique to improve comprehension and allows you to import content from various sources. Progress is saved automatically, letting you pick up where you left off.

Highlights
  • RSVP reading with ORP highlighting
  • Adjustable reading speed (100-800 WPM)
  • Automatic sentence pausing
  • Import PDFs, EPUBs, web links, and pasted text
  • Smart chapter detection and progress tracking
  • Customizable themes and fonts
  • Local document storage
Features
Read full description

Read faster. Understand more. Finish what you start. Readerr uses RSVP (Rapid Serial Visual Presentation) to show your text one word at a time, eliminating the eye movement that slows down traditional reading. Combined with ORP (Optimal Recognition Point) highlighting — which marks the exact letter your eye naturally focuses on — Readerr helps you read 2-3x faster without losing comprehension. HOW IT WORKS 1. Import your content — PDF, EPUB, a web link, or paste any text 2. Tap to start — words flow one at a time at your chosen speed 3. Adjust as you go — speed up or slow down anytime 4. Pick up where you left off — your progress is saved automatically, chapter by chapter KEY FEATURES - RSVP reading with ORP focal-point highlighting - Adjustable speed from 100 to 800 WPM - Automatic sentence pausing for better comprehension - Long-press boost for a quick speed burst - Smart chapter detection for books and PDFs, with per-chapter progress and time estimates - Explorer view — see the surrounding paragraph for context without losing your place - Three themes (Light, Dark, Warm) and a choice of fonts - Customizable haptic feedback - Your screen stays on while you read IMPORT FROM ANYWHERE - PDF documents - EPUB ebooks, organized automatically by chapter - Web articles — just paste a link - Any text you copy and paste YOUR LIBRARY, ON YOUR DEVICE All your documents, reading progress, and settings are stored locally on your device. Pick up any book exactly where you left off. FREE & UNLIMITED Readerr is free to use with up to 5 documents in your library. Upgrade to Unlimited ($2.99/month) for unlimited documents, every font and theme, and an ad-free experience. Start reading faster today. By subscribing, you agree to our Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Caff4 screens
Readerr4 screens

Verdict

The call

The clearest difference is ads: Caff at none against Readerr's shown. On price, in-app purchases, device support and iOS requirement 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. Caff sells 1 one-off in-app purchase and Readerr sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference · 9 level
Caff versus Readerr: the parameters behind the verdict, then further details
ParameterCaffReaderr
PriceFreeFree
Rating—1.0 (1 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings—1 — better
Update frequency—Every 3 days
AdsNo — betterYes
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhoneiPhone, iPad — better
Requires iOS17.0 — better18.0
Further details — not scored
Size36 MB8 MB
Age rating4+4+
DeveloperAfternoon SoftwareKirils Jegorovs

In-app purchases

1 purchases

Caff

One-time1
  • Caff Pro$9.99
2 purchases

Readerr

Subscriptions2
  • Unlimited$2.991 Month
  • Readerr Unlimited Yearly7 Days trial$17.991 Year

Questions

Is Caff free?
Caff is free to download, with in-app purchases available.
Is Readerr free?
Readerr is free to download, with in-app purchases available.
Do Caff or Readerr have ads?
Readerr shows ads; Caff does not.

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