Comparison

Rapidly vs BionicWords

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

Head to head
About

Rapidly

Enhance your reading speed and focus with this app's RSVP technique. It displays words sequentially, reducing eye movement to help you process articles, PDFs, and EPUBs faster. Track your progress and adjust your reading pace from 100 to over 1200 WPM.

Highlights
  • RSVP reading technique
  • Import from URL, clipboard, files
  • Adjustable reading speed (100-1200+ WPM)
  • Automatic chapter detection
  • Progress tracking
  • Dark mode
  • Resume reading
Features
Read full description

Read 3x faster with Rapidly. Rapidly uses RSVP (Rapid Serial Visual Presentation), a technique that shows words one at a time at a fixed point on screen. By reducing eye movement, it helps you stay focused and move through articles, PDFs, EPUBs, and text faster. HOW IT WORKS Instead of scanning line by line, Rapidly presents words sequentially so you can focus on the content and build faster reading speed over time. IMPORT FROM ANYWHERE - Paste text from your clipboard - Import articles from a URL - Open PDF, EPUB, and TXT files - Share directly from Safari, Chrome, and other apps FEATURES - Read from 100 to 1,200+ WPM - Gradually ramp up speed as you train - Automatic chapter detection for books and long reads - Progress tracking with time remaining - Reading history for every article, book, and document - Dark mode for comfortable reading - Resume exactly where you left off - No account needed, and your content stays on your device FREE VS UNLIMITED Free - Up to 800 WPM - Clipboard and URL imports - 5 imports per day Unlimited - 1,200+ WPM - Unlimited imports - PDF, EPUB, and TXT support Turn articles, books, and documents into faster, more focused reading sessions with Rapidly. Privacy Policy: https://rapidly.bagl.dev/privacy-policy Support: https://rapidly.bagl.dev/support

About

BionicWords

Features
Read full description

BionicWords uses RSVP (Rapid Serial Visual Presentation) to display text one word at a time at a fixed focal point. Your eyes stay still. Words flow to you. No skimming, no re-reading, no losing your place. Every word lands exactly where your brain expects it. The secret is the Optimal Recognition Point. Each word is displayed with its natural focal letter highlighted — the exact point where your eye locks when reading. Your brain recognises words faster, processes meaning quicker, and retains more. Start at 200 WPM. Work your way to 600. Push past 900 if you dare. Your reading speed is the only limit. HOW IT WORKS Paste any text, open a file, or load from your library Tap play — words appear one at a time, centred on the focal point Your highlighted focal letter stays fixed, your eyes stay relaxed Adjust speed on the fly — from a gentle 50 WPM to a blazing 1500 WPM WHAT YOU CAN READ Paste any text — articles, study notes, emails, blog posts, book chapters. Import TXT files directly. Upgrade to Pro to import PDFs and EPUBs — BionicWords intelligently strips out page numbers, headers, and formatting noise so you only see the words that matter. SMART READING Not all words are equal. BionicWords automatically pauses slightly longer at sentence endings, clause breaks, and complex words. The rhythm feels natural, not robotic — even at high speeds. SPEED PRESETS FOR EVERY LEVEL Chill (150 WPM) — relaxed, easy comprehension Normal (250 WPM) — average adult reading speed Fast (400 WPM) — comfortable push Rapid (600 WPM) — serious readers Insane (900 WPM) — speed reading territory Ludicrous (1200+ WPM) — test your limits Or set any custom speed with the precision slider and fine-tune buttons — adjustable in real-time, even mid-sentence. TRACK YOUR PROGRESS See your words read, time elapsed, and actual average WPM after every session. Upgrade to Pro for reading streaks, all-time stats, weekly charts, and a full reading history so you can pick up exactly where you left off. DISTRACTION-FREE DESIGN Pure black background. White text. Red focal point. Nothing else. No banners, no pop-ups, no clutter. When you're reading, BionicWords disappears — leaving only the words and your focus. BIONICWORDS PRO — UNLOCK EVERYTHING One-time purchase. No subscription. Keep it forever. Remove all ads Import PDF and EPUB files Reading history and bookmarks Resume where you left off Advanced stats and reading streaks 6 premium themes including Sepia, Midnight, and OLED Extra fonts including OpenDyslexic for accessibility Unlimited daily reading sessions BUILT FOR Students — get through textbooks and papers in half the time Professionals — stay on top of reports, briefs, and industry reading Book lovers — finally finish that reading list Lifelong learners — consume more knowledge, retain more of it Anyone who reads on a screen — which is everyone Your data stays on your device. No account required. No tracking. Just reading, faster.

Screenshots

Rapidly4 screens
BionicWords4 screens

Verdict

The call

The clearest difference is update cadence: BionicWords at every 2 days against Rapidly's fortnightly. BionicWords also leads on iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases 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. Rapidly sells 4 in-app purchases, starting at $2.99 per 7 days and BionicWords sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Rapidly ships an update fortnightly, BionicWords every 2 days. The most recent releases landed on September 8, 2026 and September 10, 2026 respectively.

Scorecard2 real differences · 7 level
Rapidly versus BionicWords: the parameters behind the verdict, then further details
ParameterRapidlyBionicWords
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyFortnightlyEvery 2 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.113.0 — better
Further details — not scored
Size43 MB68 MB
Age rating4+4+
DeveloperBAGL LIMITEDCODENESTLE PTY LTD

In-app purchases

4 purchases

Rapidly

Subscriptions3
  • Rapidly Pro3 Days trial$2.997 Days
  • Rapidly Pro7 Days trial$3.991 Month
  • Rapidly Pro7 Days trial$14.991 Year
One-time1
  • Rapidly Pro$24.99
1 purchases

BionicWords

One-time1
  • BionicWords Pro$3.99

Questions

Is Rapidly free?
Rapidly is free to download, with in-app purchases available.
Is BionicWords free?
BionicWords is free to download, with in-app purchases available.
Do Rapidly or BionicWords have ads?
Neither Rapidly nor BionicWords shows ads.
Which is updated more often, Rapidly or BionicWords?
Rapidly ships an update fortnightly, and BionicWords every 2 days. Most recently, Rapidly was updated on September 8, 2026 and BionicWords on September 10, 2026.

Other comparisons