FastReadi vs Kairo
FastReadi
fastreadi.comKairo
kairoreader.comSide by side
| Figure | FastReadi | Kairo |
|---|---|---|
| Price from | $3.33/mo | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| iOS | Yes | — |
| Android | — | Yes |
| Plans published | 5 | 1 |
| Spec score · Speed Reading Apps | 8.9 (#2) | 7.7 (#16) |
| Bionic reading | Bionic mode bolds word beginnings to guide reading through full text. | Bionic Reading displays timed text chunks with emphasized word beginnings while keeping more sentence context visible. |
| File formats | The site lists EPUB, MOBI, PDF and TXT as supported library formats. | Kairo 1.1 supports EPUB, MOBI, PRC, AZW, FB2 and FB2.ZIP, DOCX, text-based PDF, TXT, Markdown, HTML and HTM files. |
Plans
FastReadi
- FreeFree
- Pro$3.33 a month
- Monthly subscription$7.99 a month
- Annual subscription$39.99 a year
- Pro$39.99 a year
In their own words
FastReadi
FastReadi is an iOS app that brings speed reading, lecture capture and AI study tools together. Focus mode shows one word at a time, while Bionic Reading emphasizes the beginnings of words; reading speed can be adjusted from 100 to 800 WPM. The library supports EPUB, MOBI, PDF and TXT. The app records and transcribes lectures, keeps them alongside books, and supports voice notes on books. Its book chat answers from uploaded pages and cites the passages behind replies. Study tools include AI flashcards, spaced repetition, chapter summaries, quizzes, exam planning, a Study Hub and mastery tracking. The Free plan includes reading, recording and capture, plus a weekly allowance for AI summaries, quizzes, study guides and book chat; reading features remain free without a paywall. Pro costs $39.99 a year and includes unlimited AI summaries, quizzes, study guides, flashcards, book chat and lecture transcription, along with smart notes and cloud sync. The app supports offline use after login and lists English, Spanish, French and Portuguese. Apple's listing says identifiers and usage data may be used to track users across other companies' apps and websites; Apple notes this disclosure is unverified.
Kairo
Kairo is a free Android app for reading DRM-free ebooks and documents in standard, adaptive RSVP, and Bionic Reading modes. The reader offers scrollable chapters, inline images, a table of contents, bookmarks, progress tracking, and a movable focus word. Adaptive RSVP aligns words with ORP and changes timing based on punctuation, word length, syllables, clauses, and readability. Bionic Reading emphasizes word beginnings while showing more sentence context. Reading profiles control pacing, typography, brightness, and focus, with six themes available. Focus mode provides a full-screen view and can optionally enable Android Do Not Disturb. Kairo 1.1 supports EPUB, MOBI, PRC, AZW, FB2, FB2.ZIP, DOCX, text-based PDF, TXT, Markdown, HTML, and HTM. Files must be DRM-free; scanned PDFs and OCR are unsupported. Imported content and reading data remain in private device storage.