Lesefluss

Rapid Serial Visual Presentation

Read faster.
One word at a time.

Speed reading app for Android. Import any book, read at up to 1000 WPM. Pair it with an ESP32 device for screen-free reading.

Get the appBuild the device

The App

Read on your phone

Import EPUB and TXT books, read with the built-in reader, or switch to RSVP mode for speed reading.

  • EPUB and TXT library
  • Built-in reader with themes
  • RSVP speed reading up to 1000 WPM
  • Bluetooth sync to ESP32 (optional)
Download the appGetting started →
300 WPM1%
He

Chapter 1 · The Old Man

Features

📚

Library & import

Import EPUB or TXT. Chapters and metadata detected automatically.

⚡

RSVP reading

Words flash at 100–1000 WPM with optimal letter alignment.

📖

Built-in reader

Dark, sepia, and light themes. Adjustable font, spacing, and margins.

🔍

Dictionary & highlights

Tap any word to look it up. Highlight and search passages.

🎛️

Tunable speed

Fine-tune WPM, punctuation pauses, acceleration, and focal position.

📡

ESP32 sync

Sync your book and reading position over Bluetooth.

CPU

ESP32-S3

Display

AMOLED / TFT

Connectivity

BLE 5.0

Runtime

MicroPython

Hardware

Take reading
off the screen

Pocket-sized ESP32 reader. AMOLED or TFT, single button, weeks of battery. ~€25 in parts.

Build guide →