Which means the AI helping you needs to know all of your life. Ostler learns from what you do, and answers on iMessage, WhatsApp or the app. All secure on your Mac – never someone else's server.
Per-section, at a glance. Everything you need to know today, made calm by design.
Ostler
On your Mac
Your Front Page
Sunday, 26 July · 07:42
What Ostler thinks is worth your attention today, drawn from across your whole life – and ranked, not dumped.
Needs you now3
PeopleL2
3 people are waiting on you
Ellery Wren, Marcus Delacroix and one other have messages that have gone unanswered. A reply keeps the thread warm.
from your conversations
DatesL2
Priya Ramanujan’s birthday is tomorrow
A good moment to reach out.
from your people
CommitmentsL2
Send the revised proposal to Ostara Foods
An open commitment, due Thursday.
from your commitments
PrepL2
Board dinner with Priya tomorrow
You said you’d bring the updated hiring plan. Draft is ready in your notes.
from your calendar
DraftsL2
Reply to Rebecca is ready to send
Written in your voice for her lunch invite from Tuesday.
from your messages
For you3
Reading
Stories worth your time this week
From your own newsletters: a maturity-model deep dive, the new ITIL practice guidance, and a piece on how platform teams are structured. Ranked against your Professional and Tech interests.
3 newsletters · 11 stories read down to 3
Professional
Service Management
A professional area Ostler keeps seeing across your learning.
strong4 ITIL & service-desk courses
Is this you?
A hunch
Perfect Days
A little outside your usual – slow cinema, adjacent to what you rate. Worth a gamble.
an exploration pick
Noticed
Chamonix has come up three times this week
In notes and messages. A trip idea, maybe?
across your surfaces
LearningL2
You’re 60% through the Kubernetes deep dive
Six chapters left. Next session about forty minutes.
60%from your reading
Getting set up2
Your Front Page is still filling in
Ostler is about 82% through its first read-in. Cards fill in and sharpen over the next few days as the background feeds finish settling.
82% of the first read-in done
How complete each area is
Ostler reads in each part of your life at its own pace.
People91%
Knowledge78%
Conversations64%
Preferences52%
Places38%
The Hub App · On Your Mac
Big Tech made your life their product. Ostler makes it yours again.
How a life scattered across apps becomes one private archive on your Mac.
PSPriya SWhatsApp
PSPriya SharmaLinkedIn
♪Loves live jazzderived · your messages
PSPriya SharmaWhatsApp · LinkedInone person
YOUR WIKI
Priya Sharma
LivesKennedy Town
MovedMarch 2026
Met viaJames · 2019
YOUR ASSISTANT
O
✓ answered · on-device
iMessageWhatsAppemail
ON YOUR IPHONE
Where does Priya live now?
O
O
WhatsApp · 8 Mar · in her wiki
YOUR MAC · NOTHING LEAVES
NUDGE · FROM YOUR CONVERSATIONS
You promised Tom the deck – send it before Friday?
Start with everything you have already lived. Archives from WhatsApp, Instagram, Gmail and LinkedIn drop straight in – alongside your notes from Notion, Obsidian or Evernote. That history is Ostler’s grounding: what you love, what you avoid, who matters.
A model on your Mac reads it all and works out who is who. Then the secret sauce: every fact is scored, ranked and left to fade with time – like real memory – so what matters most rises. No cloud is involved, ever.
Out comes your second brain. A wiki of your life, and an assistant that answers in the channels you already use – or on your iPhone.
From now on, it learns as you live. It keeps up with the conversations you choose – spoken, WhatsApp, iMessage, email – plus your browsing and calendar. The graph grows richer every week. All local: complete privacy, no inference bills.
So your life gets easier. Ask for the details you have forgotten. It takes notes, catches the promises you make, and nudges you before anything slips. For everyone whose life moves faster than their memory.
The world does revolve around you. One living graph of your life – on your hardware, about you and only you.
Get Ostler – $99runs on your Mac
→
Start with everything you have already lived. Archives from WhatsApp, Instagram, Gmail and LinkedIn drop straight in – alongside your notes from Notion, Obsidian or Evernote. That history is Ostler’s grounding: what you love, what you avoid, who matters.
PSPriya SWhatsApp
+
PSPriya SharmaLinkedIn
=
PSPriya SharmaWhatsApp · LinkedInone person
A model on your Mac reads it all and works out who is who. Then the secret sauce: every fact is scored, ranked and left to fade with time – like real memory – so what matters most rises.
YOUR WIKI
Priya Sharma
LivesKennedy Town
Met viaJames · 2019
ON YOUR IPHONE
Where does Priya live now?
O
Kennedy Town – she moved in March.WhatsApp · 8 Mar · in her wiki
Out comes a second brain. A wiki of your life. An assistant that knows it. With you on your iPhone.
→
From now on, it keeps up – Safari, your Watch, whatever you wear next.
YOUR MAC · NOTHING LEAVES
The world does revolve around you. One living graph of your life – on your hardware, about you and only you. Complete privacy, no inference bills.
Three things it gives you.
One memory, compiled on your Mac. Here is what it changes about your day.
Warmth, reciprocity, history. The graph of everyone you actually know.
People · top of mind
7,142 in graph · sorted by recency
James Mitchell
General Partner, Horizon Capital · Hong Kong
iMessage · email in person
2 days ago 7 conversations this month
Strong
David Chen
Lecturer, Hong Kong
Zoom · WhatsApp
Yesterday 5 conversations
Active
Sarah Wells
VP Product, Aperture Pay · London
email
18 days 1 conversation
Dormant
Mark Thompson
Founder, Patchwork · London
in person · email
42 days no recent contact
Lost touch
Imran Patel
Engineer · Singapore
WhatsApp
Today first contact
New
A living timeline of your life.
Every meeting, every message, every event. Chronological. Yours to scroll.
Today · 14 April 2026
10:30
Coffee with James – discussed VC landscape and local AI hardware
In person
13:15
Lunch with Mark – fatherhood, startups, the new flat
In person
16:00
Zoom with David – HKBU teaching plan, autumn semester
Video
18:30
Dinner with sister – Sheung Wan, 7pm reservation
In person
21:00
Reply to Tom on WhatsApp re: beta testing
Reminder
Anything a friend who’s been paying attention could do.
Some things you’ll ask. Some things you’ll be told. Answered from your own records – not the internet.
"
What did I promise this week?
Send Tom your draft pitch deck.iMessage · Tue
Reply to Sarah about July dates.Email · Wed
Send the Minisforum link to James.In person · Thu
Confirm dinner with Lucy.Done
"
Brief me before lunch with Mark.
Last seen
8 March – Sheung Wan
His update
New flat in Sai Ying Pun
His ask
Intro to a UI designer
Open thread
Patchwork deck – unread
"
Who do I need to catch up with?
Sarah Wells · 18 dOne-line reply – used to be weekly.
Imran Patel · 6 wkNo reply to his last message.
Tom Reid · 3 wkYou cancelled twice.
Three quiet check-ins worth sending.
"
What was that book Pip mentioned at dinner?
The Stories We Tell Ourselves, by Mishal Husain.
WhatsApp · 12 Feb – over dinner at Lan Kwai Fong.
"
What email am I forgetting to reply to?
Sarah Wells – about July dates.
Inbox · Wed 09:42 – marked unread four times.
"
Who introduced me to David Chen?
You›James›David
14 May 2024 · James cc'd you both on a Horizon Capital event invite.
"
What was my Mum's birthday last year?
22 March. You sent flowers from Petalo, Sheung Wan.
WhatsApp · 21 Mar 2025 – delivery confirmation forwarded the next day.
●
Sarah’s birthday is Thursday.
You mentioned in February she’d love the Yoshii cookbook. Shall I draft an order note?
iMessage · 14 Feb · Calendar · 30 Jul
●
You haven’t spoken to your brother in 8 weeks.
Last message was 2 May. His son turns one on the 18th.
iMessage · 2 May · Calendar · 18 Aug
●
Q3 board pack draft is ready in your notes.
You committed to Anna on 18 Jul. Latest draft was Tuesday’s version.
Email · 18 Jul · Notes
"
It does not pretend to know what you have not told it. That is the unusual thing.
The comfort of privacy. Architectural, not policy.
You will tell this thing everything – that is the point of it. With cloud AI, every word of that becomes someone else’s asset. Ostler is built so it can’t: there is nowhere for your data to go, because there is nothing waiting to receive it.
Figure 0.1 / System architectureBoundary: your Mac
PRIVACY BOUNDARY
Sources
iMessage
WhatsApp
Email
Calendar
+15 sources
↓
OSTLER CORE
Local · encrypted
↓
Outputs
Chat
Graph
Timeline
No arrow leaves the boundary.
No cloud dependency
Pull the ethernet cable and the system continues to function. Knowledge graph, vector index, language model – all on your Mac. The internet is consulted only for public data, never personal.
No telemetry
Personal data is never transmitted to Creative Machines or any third party. Zero analytics, zero diagnostics. We have no way to receive or read your data.
Encrypted at rest
Whole-disk encryption protects everything today, and each Ostler database adds its own AES-256 layer keyed to your passphrase as it rolls out. Without your keys, the contents are unreadable – even to us.
Pull the ethernet cable. It still works.
Pricing
Hub buys you Ostler on your Mac forever. Pro extends Ostler to your iPhone.
$99/once
Hub
One-time · Launch price
Includes first 30 days of Pro
+
$9.99/mo
Ostler Pro
Via iOS App Store
Hub is Ostler on your Mac, forever. Pro keeps it learning and puts it on your iPhone. What’s in each
Your Mac does the thinking – free, forever.Pro keeps up with your life.
