Lumen

In Development

Read, highlight, annotate.

A cross-platform reading and thinking tool. Read EPUBs, highlight passages, attach handwritten notes, and keep standalone notebooks — all synced across your iPad and e-ink devices.

Beautiful EPUB Reading

Full typography controls — font scale, line spacing, margins
Three reading themes: system, sepia, night
Chapter-based navigation with persistent progress
Immersive reader mode — chrome hidden by default

Color-Coded Highlights

5 highlight colors: yellow, green, blue, pink, purple
Apple Pencil drag-to-highlight — no menus needed
Pencil highlights auto-merge when overlapping
Review all highlights per book in a filterable sheet

Handwritten Notes

Attach handwritten notes to any highlight
PencilKit on iPad, native stylus on Android
Pencil draws, finger scrolls — no mode switching
Edit existing notes inline

Standalone Notebooks

Create titled notebooks with customizable templates
Page templates: blank, ruled, dotted, grid
Multi-page support with navigation and thumbnails
Books and notebooks in one unified library

Platforms

iPad

Full feature set with Apple Pencil for natural handwriting and drag-to-highlight.

Primary Platform

E-Ink

Optimized for Boox, Kindle Scribe, and similar devices. No animations, high contrast, paginated turns.

Coming Soon

Design Principles

Content is Sacred

The reading surface owns every pixel. Chrome appears on demand.

Warm Utility

Functional without being cold. Forest green accents, warm backgrounds.

Pencil Draws, Finger Reads

No mode switching. The tool determines behavior automatically.

Contextual, Not Persistent

Toolbars appear at the point of action, not cluttering the screen.

Built With

Expo / React NativeTypeScriptReadium SDKPencilKitSupabaseReact NavigationSkia GraphicsPerfect Freehand