Your other self writes your diary

Live your day.
We’ll write it.

A passing thought becomes a story.
Your AI other self remembers the little things.

Actual Mimu app screen

A little thought.
A whole story.

No need to find the perfect words. Choose the thought that feels like your day.

An illustrative sample. Your actual diary is generated from your own entries.

Your little thought

「The cherry blossoms made me take the long way home.」
MimuSample diary

Your day, written by your other self

A little room to take the long way.

I stopped for the cherry blossoms on the way home. Usually I walk right past, but today I took the longer route.

For a moment, the rush softened. That small pause was part of today, too.

with you, Mimu

Morning. Noon. Night.
A little more you.

A thought whenever you feel like it. Your other self takes it from there.

A voice that checks in on you.

“Good morning. Did you sleep well?”
A greeting from your other self starts your day. Just choose how you feel.

Mimu: Morning greeting

Ordinary days.
Extraordinary to keep.

Open a page. Find yourself there.

From Day 1 onward, time with your other self becomes a diary that is yours alone.

Mimu: Diary collection

Every feeling.
A little color.

The good days and the harder ones. See a whole month of you in your mood calendar.

Mimu: Mood calendar

More memories.
More of a glow.

It begins as a little drop of light.
Each day together adds a little more depth.

DropletTrial
Sprout~1 week
Firelight~1 month

Your other self. Your favorite color.

Look back.
Meet more of yourself.

Your days become a weekly story, then a month of discoveries.

Weekly reflection

Your other self weaves the week into a story, helping you revisit feelings that got lost in busy days.

Mimu: Weekly reflection

Monthly report

The waves in your moods. The days that felt brighter. See how you change from one month to the next.

Mimu: Monthly report
Mimu: The birth of your other self

Mimu

Hello,
my other self.

One little thought is all it takes to begin.
Your other self is waiting to meet you.

Meet your other selfDownload on the App Store

For iPhone & iPad / In-app subscription

Frequently asked questions

A few things before your first page.

Do I need to write the diary myself?
No. Your other self writes it automatically. You only need to pick a mood or whisper how you feel.
Is privacy protected?
Your diary and memories are saved on your devices and in iCloud. Some input is sent to external AI services to generate entries. Read our Privacy Policy for details.
How long until the diary deepens?
Your thoughts, moods, and past entries become memories for your other self. The more you record, the more there is to reflect on.
How is this different from a chat app?
Mimu is not a chat app. Your other self is "another you" who observes your day and records it as a diary. The core is observation and recording, not dialogue.
About subscription and pricing
Mimu uses an in-app subscription. Check the App Store and in-app purchase screen for current prices, trial eligibility, and automatic renewal details.
Is there a trial?
Trial availability and eligibility depend on your region and account. Check the in-app purchase screen for your offer.
Can I use it on multiple devices?
Yes. Your diary and your other self's memories sync across iPhone and iPad via iCloud. By choosing a primary device, you can consolidate diary generation onto one.
If I cancel, are my diaries lost?
No · your records remain in iCloud. Your other self enters a "sleeping" state, and awakens when you resume.
Which devices are supported?
iPhone and iPad running iOS 17 or later.