Why I Built Lexis - A Free, Local-First AI Productivity Suite

Lexis — Thu, 03 Sep 2026 18:36:32 +0000

I've tried every productivity app out there. Notion, Obsidian, Todoist, Habitica, Day One - you name it. Every single one either wants my credit card, my email, or my data. Some want all three.

So I built Lexis (lexisapp.xyz) - a free, local-first productivity suite that combines habits, notes, journal, tasks, documents, and an AI assistant into one app. No sign-up. No subscription. All data stays on your device.

What is Lexis?

Lexis is a web app (also available as a desktop Electron app) that bundles six productivity tools into one:

Habits - Track daily habits with streaks, analytics, and a calendar view
Notes - Rich text notes with full markdown support
Journal - Daily journaling with mood tracking
Tasks - Task management with priorities, due dates, and kanban-style organization
Documents - Create and manage longer-form documents
Noor - An AI assistant powered by three models (Ethos 4.7, Logos 4.5, Verse 4) that can chat, generate images, and help with your productivity data
Everything runs in the browser. Your data is stored locally in IndexedDB. Nothing is sent to any server - not even us.

Why Local-First?

The local-first movement is about giving users ownership of their data. When your notes live in Notion's servers, you're at the mercy of their pricing, their uptime, and their privacy policies.

With Lexis:

Your data never leaves your device
No account needed - just open the app and start using it
Works offline - full functionality without internet (except AI features)
GDPR compliant by design - we literally can't see your data because it never reaches our servers
The AI Assistant (Noor)

I wanted an AI that feels like it's yours, not a corporate chatbot. Noor is Lexis's built-in AI assistant with three models:

Ethos 4.7 - the creative, conversational model
Logos 4.5 - the analytical, precise model
Verse 4 - the fast, efficient model
Noor can chat with you about your tasks, habits, and notes. It can generate images. Voice dictation runs through your browser's built-in speech recognition — no cloud transcription needed.

Tech Stack

Next.js 15 with App Router
TypeScript throughout
Tailwind CSS for styling
Framer Motion for animations
Electron for the desktop app
IndexedDB for local storage
NVIDIA API for the AI models
Vercel for hosting
Try it: lexisapp.xyz - no sign-up, no credit card, just open and use.

DEV Community: Lexis

Why I Built Lexis - A Free, Local-First AI Productivity Suite