Import01
Bring your own books
Kairo imports DRM-free EPUB and MOBI files from Android storage, extracts metadata and covers, then keeps the library local.
EPUB + MOBI
RSVP-first reader for Android
Kairo
A calm RSVP reader for Android, built for speed reading without chaos. Import DRM-free EPUB or MOBI books, read normally, then shift into focused word-by-word momentum.
Technical notesBuy me a coffee
- Formats
- EPUB / MOBI
- Modes
- Reader + RSVP
- Pacing
- Adaptive
Feature scroller
From library to high-speed focus, the path stays short.
Kairo loop01
Import
EPUB + MOBI
Import
Bring your own books
Reader02
Scroll when you want context
A quiet long-form reader gives chapter navigation, page-aware progress, bookmarks, images, and a clean handoff into RSVP.
Resume state
RSVP03
Accelerate without visual noise
Words stay anchored around the optimal recognition point, with adaptive timing for length, syllables, punctuation, clauses, and long words.
ORP guided
Control04
Profiles for different kinds of reading
Balanced, Chill, Narrative, Focus, Flow, Sprint, and Study profiles make speed reading feel tuned rather than forced.
7 profiles
Focus05
Low-distraction by design
Focus mode, brightness controls, typography, low-glare themes, and persistent preferences keep the session calm.
Local prefs
About the project
Speed without the agitated feeling.
Most reading apps treat RSVP as a side feature. Kairo starts with the RSVP reading loop and builds outward: import a book, read in a quiet scrollable reader, then launch speed reading from the exact place you are already focused.
The engine shapes timing around punctuation, sentence flow, long words, phrase rhythm, page breaks, and readability floors. The result is a focused reader for people who want forward motion without turning reading into visual stress.
Small technical details
Native Android, local-first reading state, tuned RSVP pacing.
Kairo is built as a native Kotlin app with Compose surfaces, local persistence, parser work for real-world ebooks, and language-aware tokenization foundations for Latin, CJK, and RTL text flows.
Kotlin 2.1 Android app
Jetpack Compose UI
Room + DataStore persistence
EPUB spine and MOBI parsing
Language-aware tokenization
CJK and RTL foundations
ORP guide controls
Page and paragraph pause shaping
Speed bands
300 to 1,800+ WPM controls
Pause shaping
Paragraph and page-break breathing
Readability
Length, syllable, rarity, and complexity timing
Reader state
Progress, bookmarks, preferences
RSVP profiles
Choose the rhythm for the material.
Profiles tune cadence, punctuation, difficulty holds, and ramping without requiring every reader to start from raw sliders.
Balanced
Natural cadence with clear punctuation breathing
Chill
Slow, spacious pacing for relaxed reading
Narrative
Expressive flow for fiction and inner voice
Focus
Sharper rhythm without dropping punctuation cues
Flow
Continuous mid-fast movement with smooth transitions
Sprint
Very fast, with readable pause structure
Study
Deliberate timing for dense material
Search intent
For readers searching for calm speed.
Kairo is for RSVP reading, speed reading practice, calm reader workflows, focus reading sessions, and mobile ebook reading where the experience stays sparse, readable, and under the reader's control.
RSVP readingspeed readingcalm readerfocus readingAndroid ebook readerORP highlightingEPUB readerMOBI reader