A quiet place to think in writing.
A calm notebook for people who think by writing. Write freely, and Nemosine finds it again when it matters.
On the web, on iPhone through public TestFlight, and as a preview on Windows and Linux. The Mac app comes at launch, Android later. On-device AI needs the iPhone app for now.
You have the ideas. You just can't get back to them when they matter.
Nemosine finds a note by what it meant, brings back the ones that went quiet, and lets you pick a project back up months later without thinking it all through again.
Write and find
Write it down now. Find it again later.
Write what's on your mind. In the iPhone, iPad and Mac apps you can also say it, and search finds a note by what it meant, not the word you used.
From a note to finding it againRead moreClose
- Opens at the match
- A search result opens scrolled to the passage that matched, lit for a moment so your eye finds it.
- Recall
- A daily notification in the iPhone, iPad and Mac apps brings back a note that has gone quiet, picked from how you actually read and edit.
- No filing first
- Start typing without picking a folder or a template. You don't have to become a librarian for your own notes.
- A real editor
- Headings, lists, quotes, checklists, tables, images and code blocks.
- Links and the star map
- Link notes with [[, and switch on the star map to see everything you've written as stars, each sized by how much you wrote.
- Tasks and reminders
- A date you type offers a reminder, and an early feature gathers every checkbox into one task list.
Help when you ask
An assistant that stays out of the writing.
Ask a question and it searches and reads your notes, answers with the notes it used, and asks before it changes anything. In the iPhone, iPad and Mac apps it can run entirely on the device, free, even in airplane mode.
What did I decide about the four-day week, and why?
Four clinical days a week from January, with Fridays kept for admin, reading and nothing. You'd been running on empty since spring, and waiting for it to calm down hadn't worked.1 Savings cover the lower income for at least a year.2
What runs on your deviceRead moreClose
- Answers you can check
- Every answer links the notes it read, so you can open the source and see for yourself.
- You approve every change
- The AI proposes edits and drafts new notes. Nothing is saved until you accept it.
- Search by meaning
- The search model runs on the device in the iPhone, iPad and Mac apps (iOS 18 or macOS 15 and later). It downloads once, over Wi-Fi by default.
- Voice notes, transcribed on the device
- Record and transcribe without the audio reaching a cloud service. Requires iOS 26 or macOS 26.
- Text from images
- Pull the text out of a photo or a scan, on the device, in the iPhone, iPad and Mac apps.
- Cloud AI only if you ask for it
- Nemosine Pro adds a powerful cloud model, currently GPT-6 Luna from OpenAI. It stays off until you accept the Cloud AI terms.
Decide
Turn a month of notes into one decision.
Select the notes that belong together and crystallize them into an insight. The source notes move inside it, so there's one current version and no copies to keep in step.
How crystallizing worksRead moreClose
- The twin editor
- Your sources in one pane, the insight you're writing in the other.
- Absorbed, not copied
- Source notes move into the insight instead of being copied, so there's never a second version going stale.
- The Shelf
- Finished insights leave the folder and sit at the top level, where the conclusions are easy to find.
- Still a normal note
- An insight is an ordinary note. Open it, edit it, or break it back apart.
Offline and private
Yours, and on your device.
Nemosine works with no connection at all: notes live in a database on your device. Turn on sync and each note is encrypted before it leaves, with a key from a sync password we never receive.
How the privacy worksRead moreClose
- Local first
- The app reads and writes on your device. Airplane mode is a normal mode, and changes reconcile when you're back online.
- End-to-end encrypted sync
- Note content and attachments are encrypted before upload. Our server holds encrypted rows and the metadata needed to route them, such as account and device IDs, timestamps and versions.
- No trackers
- No analytics or advertising code in the app, and error reports are sent only if you agree. We count storage and requests to run sync, never what you wrote.
- Sensitive folders, hidden
- Mark a folder sensitive and it's hidden from lists, search and recall until you show it with your PIN. Folders inside inherit it. The PIN hides; it doesn't encrypt.
- A Norwegian company
- Nemosine AS is based in Norway and works under GDPR. The privacy policy names every service that handles your data and what each one can see.
- Leave any time
- Export everything as Markdown whenever you like, and delete your account from inside the app.
Writing, search, on-device AI and sync are free, and stay free.
Nemosine Pro
Bigger questions, across everything you've written.
Pro brings a powerful cloud model, currently GPT-6 Luna from OpenAI, to questions that span months of notes. It stays off until you turn it on, and reads only what you allow.
- Currently GPT-6 Luna
- It can draft a new note with the sources it used, and nothing is saved until you approve it.
- You choose what it reads
- Cloud AI stays off until you accept the Cloud AI terms, and sees only what a request includes. We don't send your account or IP address to OpenAI.
- No training on your notes
- OpenAI works under a data processing agreement, with no training on your content. The privacy policy spells out what OpenAI keeps, and for how long. If the model or provider changes, we tell you before it happens.
- Sensitive notes ask first
- A sensitive note only goes to a cloud model after the app warns you and you choose to go ahead.
- 10,000 credits a month
- Credits cover cloud requests. On-device AI and ordinary writing never use one.
- Sync that keeps up
- 1 GB for notes and app data, plus 5 GB for files and attachments, encrypted across every device you use.
Think clearly. Keep it yours.
Free, and the whole app. Start writing in your browser, no account needed.