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Say it, don't type it in
Speak or type your memories — "I drove that old pickup all through college." No forms, no dropdown menus. The AI pulls out the who, the where, and the when.
The AI-powered life-history journal
Tell your story.
Then ask it anything.
Talk about your life the way you'd tell a friend — type or speak plain sentences like "I lived at 123 Main Street from 2003 until December of 2014." BigDayToday builds a beautiful, scrollable timeline, writes your memories back to you as real prose — and lets you ask your own history questions and get grounded answers.
iPhone & iPad · Private by design · Great with AI, fully usable without it
Powered by AI
You don't fill out a form.
You have a conversation.
It starts with talking. Say it the way you'd say it to a friend, and the AI picks out the who, where, and when — then asks the thoughtful follow-ups that make a memory worth keeping, and lands it on your timeline.
Adding an entry…
I lived at 123 Main Street from 2003 until December of 2014.
Got it — almost twelve years on Main Street. What made that house home? Who lived there with you?
We moved in right after we got married. Both of our kids were born while we lived there.
That's a big chapter — newlyweds to a family of four. Is there a moment in that house you never want to forget?
Teaching the kids to ride bikes in the driveway. And the huge maple tree out front every fall.
✓ Saved to your Home thread
…and when you come back, you don't get your words played back to you. You get something like this:
The house at 123 Main Street was where your life changed shape. You arrived in 2003 as newlyweds, and over the next eleven years it became the backdrop for your family's first chapter — both of your children were born while you lived there, and its driveway is where they learned to ride their bikes.
When you picture it now, it's autumn: the great maple out front turning, the house behind it full. You closed that chapter in December of 2014 — but on your timeline, it's never far away.
Written by BigDayToday from your conversation
Ask
Your life, made searchable.
Just ask.
Once your history is in BigDayToday, you can talk to it. Ask a question in plain English and get a real answer — one drawn straight from what you've recorded, never invented. Point it at a single thread or your whole story, and let it do the remembering for you.
Asking about
Everything
How many places have I lived, and where the longest?
You've lived in six places. The longest was 123 Main Street — almost twelve years, from 2003 to December 2014.
How many poodles have I owned?
Two — Biscuit (2009–2021) and Cooper, who's still with you since 2022.
Who did I work with at my first job?
At Harbor Coffee (1999–2002) you've recorded two coworkers: Dana Ruiz and Marcus Bell.
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Grounded in your real history
Answers come only from what you've actually recorded — it counts, names, and dates from your own timeline instead of guessing or filling in blanks.
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Ask a thread, or your whole life
Choose a context — Career, Home, Pets — or point it at Everything and let it search across every chapter at once.
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A real conversation
Follow up, dig deeper, change the subject. It remembers the thread of the conversation the way a good listener would.
Prefer to do it yourself? That works too.
Every entry can be added and edited by hand, and the timeline, threads, and browsing all work with no AI at all. Add your own AI key and it gets faster and richer — the conversations, the prose, and Ask all switch on. Either way, the app is fully yours.
Want the AI? Start with a free key.
The AI features — the conversations, the prose it writes back, and Ask — run on Anthropic's Claude, which uses an API key. We'll send you one free to get started, no cost and no catch. Already have your own Anthropic key? Paste it into Profile instead. And if you'd rather skip AI entirely, the timeline, threads, and journaling all work without a key.
What you can do
A memoir that writes itself
You bring the memories. The AI brings the craft — the questions, the structure, and the words — and your life story assembles itself, thread by thread.
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A biographer's questions
The AI doesn't just record — it gets curious. It asks the leading questions a good interviewer would, drawing out details you'd never think to write down.
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Prose, not playback
Come back to any entry and read genuinely meaningful writing about that chapter of your life — not your own words parroted back at you.
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Ask your history anything
Query your own timeline in plain English — "how many jobs have I had?", "when did we move to Denver?" — and get answers drawn straight from what you've recorded.
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Threads for every storyline
Home, Career, Pets, Education, Health — your entries land on parallel threads, each one a storyline of your life.
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A living timeline
Pan through the decades, pinch to zoom, and watch the shape of your life emerge — overlapping chapters, gaps, and all.
How it works
Tell it, keep it, ask it
1
Just say it
Speak or type a memory the way you'd tell it — a place, a person, a chapter. Plain sentences are all it takes.
2
Watch it take shape
The AI asks a few good questions, writes your memory back as prose, and lands it on the right thread of your timeline.
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Ask it anything
Once it's in, your life is searchable. Ask a thread or your whole story a question and get an answer grounded in your own history.
Loved by early users
Kind words
"I just talked about my first apartment for two minutes, and it asked me things my own kids never have. What it wrote afterward made me a little emotional, honestly."
"Being able to just ask 'how many cars have I owned?' and get the real answer back — that's when it clicked for me."
"Adding my old cars and all the places I've lived turned into a two-hour trip down memory lane."
Start telling your story
BigDayToday is coming soon to iPhone and iPad. One sentence is all it takes to begin — the AI will take it from there, and before long you'll be asking your own life the questions.
Coming soon to theApp Store