InkPoint/01
Featherweight
Engineered for ~380 KB of RAM. Stability and fast refreshes come before everything else.
Open firmware · Xteink X3 / X4
A reader that gets out of the way.
InkPoint is lightweight, open-source EPUB firmware built for constrained e-ink hardware. Fast page turns, honest typography, and nothing you didn't ask for.
Built for reading, not features.
01 — WHY/02
Typography that breathes
Serif and sans faces, adjustable spacing, paragraph indents, and a clean page that respects the words.
/03
Three ways to update
Flash over USB from this page, drop a file on the SD card, or pull updates over Wi-Fi. Your choice.
/04
Reading, tracked
Streaks, finished books, and a flashcard deck for what you want to remember — opt in, never noisy.
/05
A Pomodoro on paper
A focus timer designed for e-ink: minute-resolution refreshes and a full-screen flash between phases.
/06
Open, all the way down
Community firmware. Read the source, file an issue, send a patch. No accounts, no telemetry.
One image, two readers.
02 — HARDWAREDevices
X3 & X4
MCU
ESP32-C3
Panel
E-Ink 800×480 / 528×792
Detection
Automatic
The same firmware boots on both the X3 and the X4 — the panel is detected at startup, so there's a single image to flash and a single release to follow.
Ready when you are.
Connect your reader over USB-C and flash InkPoint straight from the browser — Chrome or Edge, no downloads.
Install InkPoint →