CogniLens vs Readgio
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
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.
- 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
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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
Verdict
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
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.
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.
CogniLens ships an update every 3 weeks, Readgio fortnightly. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.
| Parameter | CogniLens | Readgio |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.8 (5 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 | 5 — better |
| Update frequency | Every 3 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Freemium |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.4 — better | 18.5 |
| Further details — not scored | ||
| Size | 90 MB | 69 MB |
| Age rating | 4+ | 4+ |
| Developer | Cognition Labs | Anna Sadnova |
Customer experience
CogniLens
Readgio
In-app purchases
CogniLens
- CogniLens Monthly$5.001 Month
- CogniLens Yearly$54.001 Year
Readgio
- Pro: monthly14 Days trial$1.991 Month
- Pro: annual14 Days trial$13.991 Year
- Pro: lifetime$19.99









