Now Available on the App Store

Your second brain,
supercharged by AI.

Capture facts from books, articles, and podcasts in seconds. Let AI expand them with context you'd never find on your own. Never forget what matters.

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App Store

 See How It Works
100% Free to start
No credit card
Privacy-first

Great ideas deserve better
than your memory.

You're not alone. Most people forget 90% of what they read within a week. Your current notes app isn't helping.

$25 books, $0 retained

You highlight 30 passages, close the book, and forget everything within days. That investment? Gone.

Notes graveyard

Your notes app is a black hole. Thousands of entries you'll never search, never revisit, never benefit from.

Complex tools, simple needs

You just want to save a fact and remember it. Not learn a new tool.

The solution

Meet Knodo.
Knowledge that sticks.

Purpose-built for one thing: capturing individual facts from any source and expanding them with AI-powered context. No complexity. No setup. Just your knowledge, organized and enhanced.

Knodo — Your Knowledge Vault
Knowledge Vault

All your facts, beautifully organized

Your personal knowledge vault keeps every fact searchable, categorized, and at your fingertips. Browse by category, search by keyword, or just scroll through everything you've learned.

AI Expansion

Turn any fact into deep knowledge

Tap "Expand with AI" and watch a simple fact transform into rich context — historical significance, related concepts, and insights you'd never find on your own. Like a research assistant in your pocket.

Knodo — AI Fact Expansion
Knodo — Quick Capture
Quick Capture

Save a fact in under 5 seconds

Type it, speak it, or scan it from a book. The capture flow is designed for zero friction — so you never lose a thought while reading, listening, or browsing.

Categories & Tags

Organized without the effort

AI suggests categories and tags for every fact you save. Science, History, Philosophy, Technology — your knowledge is automatically filed so you can find it when it matters.

Knodo — Categories & Tags
Knodo — Knowledge Score & Stats
Knowledge Score

Track your learning journey

Watch your knowledge grow with streaks, stats, and a personal knowledge score. Knodo makes building your second brain feel rewarding — not like a chore.

Simple as 1-2-3-4

How Knodo works

Capture

Type it, speak it, or scan a book page. Save any fact in under 5 seconds.

Organize

AI suggests categories and tags. Find anything in seconds — even facts from months ago.

Expand

One tap: AI generates context, history, and insights. Like a personal research assistant.

Rediscover

Daily notifications resurface your best facts. Knowledge that sticks — effortlessly.

Powerful features

Everything your brain needs.

Built for speed, intelligence, and simplicity. Every feature serves one purpose: helping you remember.

Voice Capture

Hands-free voice dictation to capture facts on the go. Perfect for commuters and audiobook listeners.

AI Fact Expansion

AI

One tap transforms a simple fact into rich context, history, and insights. Like a research assistant in your pocket.

Smart Connections

AI

AI links related facts automatically. Your vault reveals hidden patterns across months of learning.

Camera OCR Scanner

Point your camera at a book page. Knodo reads it, saves it, and organizes it — no typing required.

Daily Rediscovery

Resurface random facts from your vault every time you open the app. A built-in way to revisit what you've learned — effortlessly.

Home Screen Widgets

Glanceable widgets right on your home screen. See your latest facts and knowledge score without opening the app.

✦ AI-Powered

Turn a simple fact into a
mini-encyclopedia.

Save "Egyptian cubit = 18 inches" and tap Expand. In seconds, AI delivers historical context, construction methods, related measurements, and more — all personalized for your vault.

3-5 paragraphs of rich context generated in under 5 seconds

Cites verifiable information — not generic AI fluff

100 expansions per month with Premium

Before History

The Egyptian Royal Cubit

The cubit was approximately 18 inches, based on the length of the Pharaoh's forearm from elbow to fingertips.

✦ AI Expanded
After History

The Egyptian Royal Cubit

The Royal Cubit, standardized around 2700 BCE during the Old Kingdom, measured approximately 52.4 cm (20.6 inches). It was subdivided into 7 palms of 4 fingers each — 28 digits total.

This measurement system was critical to constructing the Great Pyramid of Giza, where the base dimensions show accuracy within 2.1 cm — remarkable precision for 2560 BCE.

Master cubit rods made from granite were kept in temples as references, making this one of humanity's earliest standardized measurement systems.

3 related facts found View connections →

Frequently asked questions

Everything you need to know before you start.

Stop forgetting.
Start remembering.

Your knowledge deserves a home. Download Knodo free today.

Download on the

App Store

No credit card. No complexity. Just your knowledge, organized and expanded by AI.