Lume

Product Introduction

1. Definition: Lume is a native Windows desktop application for note-taking, sketching, and calculation, built using the WinUI 3 framework. It operates as a local-first, system-integrated productivity tool that combines a floating quick-access bar, a live calculation scratchpad, and a rich-text editor with inline drawing capabilities.
2. Core Value Proposition: Lume exists to eliminate friction in digital note-taking by providing instant, context-aware access to a notes environment from anywhere within the Windows OS. Its primary value is capturing thoughts and calculations within seconds through global hotkeys or mouse gestures, minimizing disruption to the user's primary workflow.

Main Features

1. QuickNote Floating Shelf: A system-wide accessible panel that resides at the screen's edge. It is summoned via a user-defined global keyboard shortcut or a mouse gesture (shaking the mouse toward the screen bottom). The shelf provides live previews and quick access to all notes, organized in boards and nested folders, without requiring a full application window to be opened and focused.
2. Live Calculation Scratchpad: A dedicated thinking space that interprets and executes commands as you type. It functions as a computational notepad, providing inline output for mathematical expressions, code snippets, and unit conversions. It supports multiple independent windows that can be torn off and re-docked.
3. Integrated Ink & Multi-Format Canvas: The main Lume note window is a hybrid canvas supporting mixed content formats (text, lists, code blocks, drawings) on a single living surface. The Draw tool allows for pressure-sensitive freehand sketching with palm rejection, where ink behaves as a native content block that flows with surrounding text when edited.

Problems Solved

1. Pain Point: The cognitive load and time loss associated with switching contexts to open a separate note-taking application, create a new file, or locate an existing note, which often leads to lost ideas.
2. Target Audience: Windows power users, knowledge workers, students, developers, and creatives who require rapid information capture, perform frequent ad-hoc calculations, or brainstorm with text and sketches. Specifically targets users frustrated with slow, bloated, or disconnected note-taking apps.
3. Use Cases: Capturing meeting notes instantly during a full-screen presentation; quickly calculating a figure while analyzing a spreadsheet; jotting down a code snippet or command line argument while programming; sketching a UI wireframe or diagram directly alongside related project notes.

Unique Advantages

1. Differentiation: Unlike cloud-first, subscription-heavy note ecosystems (Evernote, Notion) or minimalist text editors, Lume prioritizes system-level integration and instantaneity. It differs from Sticky Notes by offering powerful organization, a live scratchpad, and deep formatting. Its native WinUI 3 architecture ensures lower resource usage and better performance compared to Electron-based alternatives.
2. Key Innovation: The combination of a global, persistent QuickNote shelf with a live-evaluating scratchpad within a single, locally-focused application. This creates a seamless "write-and-forget" capture flow that is unique on the Windows platform, bridging the gap between a system utility and a full-featured notes organizer.

Frequently Asked Questions (FAQ)

1. Is Lume a free note-taking app for Windows? Yes, Lume offers a fully functional free tier for Windows 10 and 11, allowing users to store up to 20 notes with access to core features like the QuickNote shelf, basic scratchpad, and export. Reading, searching, and organizing existing notes remain free indefinitely.
2. How does Lume's scratchpad calculate answers as you type? Lume's scratchpad features a live evaluation engine that interprets typed mathematical expressions, code syntax, and other commands in real-time, displaying the computed result inline, adjacent to the input, similar to an advanced calculator or a REPL environment.
3. Can I sync my Lume notes with OneDrive or other cloud services? Yes, Lume Pro includes optional, secure OneDrive sync, enabling note synchronization across multiple Windows devices. The application follows a local-first philosophy, storing data primarily on your device, with OneDrive acting as a sync layer.
4. What are the system requirements for the Lume Windows app? Lume requires Windows 10 (version 19041 or later) or Windows 11, on both x64 and ARM64 architectures. It is distributed and updated via the Microsoft Store as an MSIX package, ensuring secure installation and maintenance.
5. What does the Lume Pro subscription include? Lume Pro removes the 20-note limit, unlocks the full scratchpad (with live answers, timers, code execution), enables Draw boards and premium text formats, provides OneDrive sync, and grants access to all color themes. It is available as a monthly, yearly, or one-time lifetime purchase.