Comparison

CogniLens vs Readgio

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

Head to head
About

CogniLens

This app transforms text to make it more readable for individuals with dyslexia and ADHD. Customize spacing, size, and layout, or use text-to-speech. It supports document uploads, text pasting, and photo scanning.

Highlights
  • Text transformation for readability
  • Customizable layout and spacing
  • Text-to-speech functionality
  • Document upload and text pasting
  • Photo scanning for text conversion
  • Light/dark mode and focus controls
Features
Read full description

CogniLens makes text easier to read. Built for dyslexia, ADHD, and neurodivergent readers, CogniLens lets you transform text exactly the way you like—so it’s simpler to follow, easier on your eyes, and finally feels readable. What you can do: • Upload your documents or paste text and instantly convert it into your preferred reading format • Customize the look and layout until it feels right (spacing, size, alignment, and more) • Take a photo of any page or printed text and turn it into readable text that you can transform • Tap to listen with text-to-speech instead of reading • Use light/dark mode and focus-friendly controls • Pick up where you left off with reading history and saved position Language: English (more languages coming later) CogniLens works across iOS and the web—with a Chrome extension—so your reading settings and progress can follow you anywhere. Apple Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ CogniLens Terms of Use: https://www.cognitionlabs.com/terms-of-use

About

Readgio

This app allows you to read your EPUB and PDF files, tracking your reading progress, time, and speed automatically. Save and revisit highlighted passages, and even log physical book reading sessions to keep your entire reading history in one place.

Highlights
  • Automatic reading progress tracking
  • Chapter time estimation
  • Adjustable PDF reader mode
  • Highlighting and quote saving
  • Manual logging for physical books
  • iCloud sync for progress and bookmarks
Features
Read full description

Read your own EPUB and PDF books in Readgio. See whether you have time for another chapter, save meaningful passages and track your progress without keeping a manual log. • One more chapter? See an estimate of the minutes left in your EPUB chapter, based on your reading pace. • PDFs without the tiny print. Reader Mode adapts the text to your screen and lets you adjust the font size. The original page layout is always available. • Statistics that track themselves. Reading time, progress, speed and streaks — just read and see yourself getting closer to your goal. • Quotes you can find again. Highlight passages, search your saved quotes and revisit favourite ideas through reminders and a widget. • Paper books count too. Use the timer or log sessions manually to keep your whole reading history together. Read offline. Sync your progress, bookmarks and highlights between iPhone and iPad with iCloud. PDF Reader Mode is available for files with selectable text. Some features require Readgio Pro. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

CogniLens4 screens
Readgio4 screens

Verdict

The call

The clearest difference is rating: CogniLens at 5.0 against Readgio's 4.8. CogniLens also leads on iOS requirement (16.4 vs 18.5). Readgio's advantage is ratings volume (5 vs 1). On price, update cadence, ads and in-app purchases 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. CogniLens sells 2 in-app purchases, starting at $5.00 per month and Readgio sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

CogniLens holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Readgio has 5 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

CogniLens ships an update every 3 weeks, Readgio fortnightly. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

Scorecard3 real differences · 7 level
CogniLens versus Readgio: the parameters behind the verdict, then further details
ParameterCogniLensReadgio
PriceFreeFree
Rating5.0 (1 ratings) — better4.8 (5 ratings)
Positive reviews—100.0% of reviews
Number of ratings15 — better
Update frequencyEvery 3 weeksFortnightly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.4 — better18.5
Further details — not scored
Size90 MB69 MB
Age rating4+4+
DeveloperCognition LabsAnna Sadnova

Customer experience

CogniLens

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Readgio

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews10 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

CogniLens

Subscriptions2
  • CogniLens Monthly$5.001 Month
  • CogniLens Yearly$54.001 Year
3 purchases

Readgio

Subscriptions2
  • Pro: monthly14 Days trial$1.991 Month
  • Pro: annual14 Days trial$13.991 Year
One-time1
  • Pro: lifetime$19.99

Questions

Is CogniLens free?
CogniLens is free to download, with in-app purchases available.
Is Readgio free?
Readgio is free to download, with in-app purchases available.
Which has better reviews, CogniLens or Readgio?
CogniLens is rated higher. CogniLens averages 5.0 out of 5 from 1 ratings, while Readgio averages 4.8 from 5 ratings.
Do CogniLens or Readgio have ads?
Neither CogniLens nor Readgio shows ads.
Which is updated more often, CogniLens or Readgio?
CogniLens ships an update every 3 weeks, and Readgio fortnightly. Most recently, CogniLens was updated on October 31, 2026 and Readgio on November 5, 2026.

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