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ExtMemo

AI-powered notes that connect like a timeline.·extmemo.com

ExtMemo is an AI-powered note-taking app that links notes into chronological chains, using AI to help organize and explore personal knowledge. It offers end-to-end encryption for private memos, multi-person sharing with permissions, a visual dependency-based task manager (Hyper Todo), and a 3D semantic visualization of notes called Nebula View. It is available as a web app and as mobile apps.

What it's for

Capturing and chaining ideas, tasks, and events with automatic timestampsSecurely storing private notes with end-to-end encryptionCollaborating with a team or family on shared notes and tasksManaging tasks with visual dependencies and deadline urgency trackingVisually exploring and discovering connections between notes in a 3D map

Features 16

AI assistant that learns from stored notes to answer questions
Automatic timestamps on each note entry
Chain note-taking that links ideas, tasks, and events in context
Drag-and-drop task dependency mapping on a visual canvas
End-to-end encryption (E2EE) for individual memos or memo chains
Full-featured web app with data export in one click
Hyper Todo visual dependency and context-based task manager
In-context tasks embedded within meeting notes and documents
Interactive 3D exploration with zoom, rotate, and fly-through navigation
Multi-person sharing with flexible permissions and real-time sync
Nebula View: 3D visualization of notes as a semantic knowledge galaxy
Pressure cascading of deadlines between dependent tasks
Secure sharing of E2EE content with selected members
Semantic clustering of notes based on topic similarity
Smart deadline shuffling that highlights urgent tasks with color changes
Zero-knowledge architecture for encrypted content

At a glance

TypeMobile app

DeploymentCloud

PlatformsWeb, iOS, Android

CompanyExtMemo AI

ExtMemo

What it's for

Features 16

At a glance

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