Generate.Speak.Learn.Listen.Discover.

Your notes are plain markdown files. AI writes them. Noesis makes them intelligent. You just think.

A whole new way to think

Everything Noesis can do

Cards move slowly on their own. Shuffle to discover a new combination.

Navi Discussion

Pick 2–6 Navis and hand them a question. They hold a structured roundtable — each challenges, agrees, and builds on prior turns. Inject a comment, pause to think, or let the Moderator wrap up.

Install as App

On iOS, tap Add to Home Screen. On Android, tap Install App. Noesis runs full-screen like a native app — no App Store needed.

BYOK Multi-Key

Bring your own AI keys. No subscription. Your cost, your control.

Notes from Video

Paste any YouTube URL — get timestamped study notes, a lecture outline, or a concept map. The video stays; the knowledge is yours.

AI Roundtable

Let your Navis deliberate.

Set a topic and watch 2–6 Navis debate it from their own perspectives. Each turn builds on the last — like a podcast you can interrupt. Inject a counter-argument mid-session, pause to reflect, or steer it toward a conclusion.

2–6 ParticipantsLive SpeakerModerator30-min Sessions
Navi Discussion● Live
Roundtable

Discussion topic

Is passive income a myth or a strategy?

S
Sage
A
Aria
M
Mod
Turn 4 / 12
S
Sage
Passive income is real — but demands active setup upfront. Most fail because they skip that part.
A
Aria
Survivorship bias — 99 abandon the stream in month 2 for every success story.
ModModerator
Both fair. Let's narrow: what does "active setup" look like in practice?
Conclude Now
Inject
30 min max

Voice Input

Speak in any language — AI corrects your speech in real-time, even while you're still talking. Auto-stops on silence.

Image Shelf

Stage screenshots once, drop them into any chat. Synced live across tabs and devices — never re-upload the same image twice.

See it in action
Navi Chat
Just realized why I never remember what I read — highlighting feels productive but I'm not processing anything. It's all passive.
E
Echo
Exactly right. Passive re-reading creates an "illusion of knowing" — you recognise the text but never retrieve it. I'm saving this as a note…
Note created — Why Highlighting Doesn't Help Memory

Generated note

Why Highlighting Doesn't Help Memory

Passive re-reading builds familiarity, not recall. Explaining ideas back in your own words — elaborative interrogation — is what actually makes them stick.

learningcognitionPKM
Synced · linked to 2 related notes

Quick Note

Capture a thought in one click. Notion-style WYSIWYG with headings, lists, and quotes — autosaves as you type.

Did you know?

A chat with AI can be a note too.

Mark up any AI message — circle a key line, drop a sticky, scribble in your own handwriting. Spin the thread out as a note, then keep chatting and the note grows with the conversation.

Handwriting MarksHighlights & CirclesSticky NotesGenerate NoteMerge Later Replies
Navi Chat
What actually makes learning stick long-term?
N
Active recall beats re-reading every time — retrieve, then review.
add this to spaced-rep note!
Generate Note
Merge into existing

30+ MCP Tools

Claude Code connects to your notes with 30+ tools — search, sync, enhance, discover.

Meet your Navi

Design any AI persona. Give it a voice.

Build a Navi with any ability — English tutor, coding mentor, writing coach. Shape its personality. Set its avatar to JK Rowling or your favorite character. Then just chat, like a messenger app. With TTS and dictation, it feels like a real conversation.

Custom PersonaAny AbilityTTS VoiceDictationRole Play
Your Navis
S

Sensei

English Tutor

kindTTS
A

Ada

Code Mentor

preciseKB
R

Rowling

JK Rowling

storyteller
M

Coach Max

Writing Coach

crankyfun
For Language Learners

Quiz yourself on what you read.

Generate a vocabulary exam from any note in one click. Take it inline as an interactive note — answers live in pre-placed text-note markers. Submit, and the AI grades MCQs deterministically and translations with Gemini. A red Score: 18/20 marker locks the page.

Auto-GeneratedMCQ + TranslationAI GradingLength Presets
Vocab Exam · 2026-05-01

1. The word "meticulous" means…

careful and precise
unwilling to act

2. Translate "piece of cake"

小菜一碟
Score: 18 / 20
graded · locked

Image Generation

Generate and edit images with Gemini Pro directly inside your notes and chat.

Import from URL

Paste any article URL — or a tweet thread, or an X post. Noesis fetches the page, then an AI pass adds a TL;DR, section diagrams, key takeaways, and enriched metadata. Clean markdown in one click.

Pricing

Wait, how much does AI cost?

Bring your own Claude or Gemini API key — you pay only for what you use. Noesis auto-switches providers if one quota runs out. No subscription required.

Claude API
sk-ant-••••ABCD
Gemini API
AI••••••WXYZ
auto-failover on quota limit
Your KeysClaude APIGemini APIAuto-FailoverPay-as-you-go
Learn in Flow

Meet FlowLearn. Learn English without even trying.

Subscribe to YouTube channels you already enjoy. FlowLearn turns every video into a language lesson — vocabulary, comprehension, and listening exercises that feel effortless.

A
Vocabulary MCQ4 Qs
B
Fill in the Blank6 Qs
C
Dictation3 Qs
YouTube ShortsLong Videos10 Exercise TypesSpaced Repetition
3

Ask for it. It's already there.

Forget digging through folders. Ask in plain language and Noesis finds exactly what you need — even things you forgot you knew.

things I learned about focussemantic

Deep Work — Cal Newport Notes

focusproductivity
0.94

The Pomodoro Method

focustechnique
0.87

Why Distraction Spreads

attention
0.81
14 more results
Semantic Search30+ MCP ToolsRAG Chat

Cloud Sync

Your notes everywhere — local files and cloud, always in sync.

Work Together

Invite someone in. Work on it together.

Give contacts live access to your notes, chat sessions, and Navis. Co-edit in real time, see who's online right now, and manage roles — all backed by your trusted contact graph.

Co-edit Notes & ChatsLive PresenceRole-Based AccessContact GraphInvite by Email
Collaborate
Memory & Active Recallnote

Invite a contact

Bob Chen
Add

People with access

A
Alice (you)Owner
B
Bob ChenCollaborator
C
Carol LinCollaborator
● green = currently viewing this note
For Language Learners

AI tutors that actually know what you're studying.

Create a Navi persona as your language tutor. Listen to any sentence with word-by-word highlighting — then repeat with voice dictation while AI corrects your speech in real-time. Echo explains grammar; Whisper flags mistakes native speakers would catch.

Word-by-Word TTSLive Voice DictationSpeaking PracticeIPA Feedback
Navi Chat
Is "Je suis allé au magasin" correct?
E
Echo
Great start! "Je suis allé" uses the passé composé with être correctly. The verb "aller" always takes être as its auxiliary.
W
Whisper
Watch the agreement — if you're female, it should be allée. Past participles with être agree with the subject. A native speaker would notice.
Reading: female

Create from Any Source

Turn any PDF, URL, chat session, transcript, math worksheet, or note into a structured study guide — pick a template, one click.

YouTubetimestamped notes
PDFchapter outline
URLTL;DR + deep dive
Chatconcept glossary
Transcriptlecture notes
Math imageworked examples
Open Ecosystem

Works with the tools you already use.

Your notes are plain markdown files. Edit them in Claude Code, Obsidian, or VS Code. Noesis adds the intelligence — search, AI commentary, cloud sync — without lock-in.

Claude CodeObsidianVS Code.mdNoesis AISearch · Sync · Enhance
Claude CodeObsidianVS CodeNo Lock-In.md Files
AI Dictionary

Look up anything. In any language.

Not just words — idioms, slang, and technical terms. Now with a dedicated 國語辭典 for Mandarin. Select a quoted phrase to ask "what does this mean here?", jump through related forms, save lookups to Noesis, or share any entry as a public link.

English + 國語辭典Contextual LookupWord FormsSave to NoesisShare via Link
Dictionary
piece of cake

Translated: piece of cake →

小菜一碟輕而易舉易如反掌
piece of cakeAuto

AI Explanation

An informal idiom meaning something very easy to accomplish, requiring little effort.

Example Sentences

1. The exam was a piece of cake.

那次考試簡直是小菜一碟

Text-to-Speech

Reads aloud with word-by-word highlighting — and per-character for Mandarin & CJK. Edge voices by default; preview each one before you pick.

Think on the Page

Annotate notes like paper — but better.

Drop handwriting strokes, circles, rectangles, arrows, serial number badges, link pins, sticky notes, and icons onto any paragraph — even images and Mermaid diagrams. New: text-style markers apply formatting annotations, and floating shapes hover freely anywhere on the page. Vivid palette, full undo/redo.

Shapes & ArrowsSerial NumbersLink PinsImage & MermaidText Style MarksFloating ShapesUndo / Redo
Spaced Repetition
Reviewing at expanding intervals beats cramming.
The forgetting curve flattens with each recall.
Active retrieval > passive re-reading.
review weekly →
A⁻ A⁺

Dictation Refinement

Fixes your speech as you talk — grammar, word choice, and fluency corrected in real-time before the sentence even ends.

For Language Learners

Your reading companion. On every page.

Import any book and read it in Noesis. Select a phrase you don't know — a Companion button appears instantly. Your AI tutor breaks it down in context. Set your Navi to "JK Rowling" and have her explain her own writing.

Reading Companion — book reader with Navi vocabulary panel
Real BooksSelect & AskBilingual VocabularyCustom NaviPDF Import

JIRA Import

Import any JIRA issue as a clean markdown note — title, description, and code blocks all preserved. Backlog knowledge, searchable.

Melody

Hover the nav and your notes sing. 40+ classical pieces, six playful instruments — Hum, Robot, Fairy, Ghost, Alien, Dog.

1

AI writes. You think.

AI generates your notes automatically. Import a PDF. Have a conversation. Your knowledge base grows — without you typing a single note.

Noesis Chat
I just read about spaced repetition and how it beats re-reading...
N
Captured! Linked to your 3 existing memory notes.
Note created · linked to 3 related

Spaced Repetition vs Re-reading

learningmemorycognition
PDF & URL ImportVoice DictationMCP ToolsCloud Sync

Scroll History

Navigate your reading history with ← → — jump back to where you were after clicking a link or heading, just like a browser tab.

Learn in Flow

Listen, don't just read.

Vocabulary you've looked up plays back as a podcast — an LLM teacher narrates examples, words karaoke-highlight as TTS speaks them. Works for English and Mandarin (per-character highlighting). Tap any line to repeat.

TeleprompterKaraoke HighlightingMandarin & EnglishLLM Teacher Script
Vocab Listening

Today's vocab review · 14 words

Voice: Aria · 6:42 / 12:30

Now reading…

A meticulous editor catches every typo before publication.

中文逐字朗讀

那 次 考 試 簡 直 是 菜 一 碟。

0.9×

Echo & Whisper

Two AI voices, one deeper understanding. Echo builds on your ideas; Whisper pokes holes in them.

Share as Public Link

Publish any note, dictionary lookup, or chat as a read-only link — with a rich preview card (title, image, description) when shared in Slack or iMessage. Viewers can annotate or import it into their own library.

Language Tools

Dictionary, translator, TTS — 8 languages built in.

2

Two AIs. Two perspectives. One deeper understanding.

Every note gets commentary from Echo (who builds on your ideas) and Whisper (who pokes holes in them). Like having a supportive mentor and a sharp critic — at the same time.

Echo and Whisper AI responses in Noesis
User avatar
Echo & WhisperNavi PersonasCompanion Panel

Version History

Three-track snapshots — manual checkpoints, daily auto-saves, and pre-AI captures — so you can revert any note to exactly where you left it.

Quiz from Any Section

Hover any heading in the TOC sidebar and click Quiz Me — generate a focused quiz on just that chapter, without leaving the note.

For Power Users

Your knowledge base has superpowers.

Claude Code connects to Noesis with 30+ tools. Search, sync, enhance — all from a terminal. Each Navi can run a different AI model.

Terminal

$ claude

# What did I learn about auth?

search_semantic("auth flow")

> Found 3 notes (0.89, 0.84, 0.71)

# Sync local notes to cloud

sync_notes()

> Synced 12 files (3 new, 9 updated)

Claude Code30+ MCP ToolsMulti-ModelTerminal

PDF to Markdown

Turns any PDF into clean, searchable notes in seconds — including scan-only documents. AI OCR extracts text from image-only pages automatically.

Noesis

Your notes should make you smarter.

Not just store information — generate it, challenge it, and find it when it matters.

Switching from another markdown app? Compare Noesis with Obsidian

Prefer to write by hand? See handwriting & ink in Noesis