Kairo vs Reedy

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.

Reedy reads e-books, articles, text, and web pages in regular reading, speed-reading, and text-to-speech modes. Its RSVP speed reader presents text in sequence and supports speeds up to 3000 words per minute. Listed file formats include FB2, EPUB without DRM, KEPUB, TXT, and HTML, including books in ZIP archives. Reading tools include bookmarks, automatic tables of contents, text selection and sharing, orientation lock, adjustable text size, and light and dark themes. Reedy can extract the main content from web pages and accept pages shared from browsers, Pocket, Feedly, or Evernote. On Android, books can also be opened from Google Drive, Dropbox, and other apps or cloud services. The listed platforms are Android and a Chrome extension, though the terms identify Android as the current platform; some functions require an active internet connection. Reedy is freemium, provided at no cost, with ads and in-app purchases. Its privacy policy says it may request advertising ID and IP address and may collect error logs with device and app configuration details.