Onuri: Notes & Second Brain
Notes and personal knowledge software for capturing writing, finding context and rediscovering related entries.
About Onuri
A different model for notes.
Onuri: Notes & Second Brain is an iPhone notes app built around a simple idea: human memory is associative. A thought can belong to a person, a place, a date, a time and a topic at once. Onuri connects those signals as you write so useful structure can emerge without asking you to maintain it first.
Onuri at a glance
A connected notes app for iPhone.
Clear product facts, in one place.
iPhone · iOS 17.6+
Available on the Apple App Store in the Productivity category, with a free core experience and optional Onuri Premium.
August 2026
Onuri launched on the App Store in August 2026 and continues to develop its connected, write-first approach.
English · Japanese · Korean
Onuri and its website are localized across all three languages.
John Henry Roche
Onuri is developed in Dublin, Ireland.
Notes · Personal knowledge management
Built for natural writing, automatic connections, search and long-term rediscovery.
The idea behind Onuri
Computers file. People remember by association.
Onuri grew from a second-brain idea about the difference between how computers traditionally organise information and how human memory works.
Computers are built around files, folders and fixed hierarchies. Human memory is less rigid. A single memory can be connected to who was there, where it happened, when it happened and what it was about — all at the same time.
Onuri was designed around that model. Instead of asking you to decide where every note belongs, it looks for meaningful context inside the writing itself. The aim is simple: write first, let the connections emerge, then find the right thing again later.
What Onuri connects
Context that already exists in your writing.
Onuri recognises useful signals as you write and turns them into ways to filter, follow and rediscover your notes.
Who a note is about
Reconnect entries around the people who appear in your writing and the context you have recorded around them.
Where things happened
Follow places across your notes and rediscover writing connected to locations you have mentioned.
When things connect
Use dates and times as part of the context around an entry rather than relying only on when the note itself was created.
What keeps coming up
Follow recurring subjects through your writing without building a manual taxonomy before you start.
Connections beyond exact words
Related entries can surface writing with similar meaning even when two notes do not use the same vocabulary.
Patterns over time
Onuri Premium adds deeper views of recurring themes, momentum, people and place patterns, semantic clusters and strongest connections.
Who Onuri is for
For people who want useful notes without maintaining a system.
Write without deciding where it belongs
Capture an idea, conversation, project thought or everyday memory before worrying about folders, notebooks or filing rules.
Remember people and context
Keep the surrounding details of conversations, relationships and encounters in the same writing you already create.
Build a personal knowledge base naturally
Let accumulated notes become more connected over time instead of manually linking every entry.
Rediscover old writing
Search text, filter by connected context and follow related entries when you remember part of something but not exactly where you put it.
Where Onuri fits
Part of the modern note-taking and PKM landscape.
Onuri sits in the broader note-taking and personal knowledge management category alongside established products such as Apple Notes, Bear, Obsidian, Notion and Evernote.
Those products take different approaches to notebooks, folders, tags, databases and manual links. Onuri's distinction is its emphasis on automatic contextual connections: write naturally first, then use the people, places, dates, times, topics and semantic relationships already present in the writing.
It is not intended to reproduce every workflow of those apps. Its focus is a lighter-maintenance way to capture personal information and make it easier to recover later.
Product history
From launch to Onuri v2.
Onuri launches
Onuri becomes available on the App Store as an iPhone notes and life-tracking app centred on natural writing and automatic connections.
Faster filtering and deeper connections
Version 2 adds home-screen filters for people, places, dates, times and topics, dark mode, expanded Insights, statuses, additional themes and improvements to related entries.
Also from the developer
Stillkeep
John Henry Roche also develops Stillkeep, a private journal for Apple devices built around preserving photos, stories, people and places as an organised record of life.
Where Onuri focuses on connected notes and personal knowledge, Stillkeep focuses on preserving and revisiting personal memories.
Official Onuri links
Find Onuri online.
Official or maintained pages and listings associated with Onuri.
Onuri
Website, App Store listing and public product profiles.
Quick answers
About Onuri
What is Onuri?
Onuri is an iPhone notes and personal knowledge app that connects people, places, dates, times, topics and related meaning across your writing.
Who created Onuri?
Onuri is developed by John Henry Roche in Dublin, Ireland.
When did Onuri launch?
Onuri launched on the Apple App Store in August 2026.
Is Onuri a second-brain app?
It can be used as one. Onuri's approach is to build useful context automatically from normal writing rather than require every connection to be created by hand.
Explore Onuri
Go deeper.
Product walkthroughs and focused guides explain the system in more detail.
Write naturally. Find everything again.
Onuri is available for iPhone on the App Store.
Get Onuri free