Mongle Haru Meet Mongle Haru
First Steps Mongle beside an open diary in a sunlit garden

Little notes. Gentle friends.

Even ordinary daysare worth keeping.

Feelings you can't quite put into words. Tiny moments you might soon forget. Mongle Haru is a diary app that gives those parts of your day a place to stay.

Read our story

01 / A space we're making

An honest line,not a perfect page.

At the end of a long day, even keeping a diary can feel tiring if you think you have to get it right.

That's why Mongle Haru makes room for small beginnings. Pick a mood, or jot down a thought as it comes. Leave as much or as little as feels right for you.

A little is enough

One mood sticker. One line that sounds like you. What you feel today matters more than how much you write.

Every feeling is welcome

You don't have to save only the happy days. Sadness and feelings you can't quite name are part of your day, too.

A reason to come back

A favorite Mongle and decorations that make you smile. We want to bring a little delight to the time you spend writing.

02 / Friends beside your journal

A little friendship,inside your diary.

Mongles have more than different looks. Each has their own likes, personality and way with words. As you meet them through journaling, get to know them in the collection.

A friend who cheers on your first little step

First Steps Mongle

Yaaay, we finally met!!

A friend who welcomes every feeling gently

Mood Buddy Mongle

...I'll always save a place beside your heart.

A friend who remembers that you came back

Two-Day Promise Mongle

Oh...you're back? Really?

These personalities and first greetings come from the Mongle collection.

Explore the Mongle collection
Journal Art Mongle in a craft studio decorated with washi tape and journals

Little things to look forward to

As your days add up,so do the little joys.

Add stickers and choose a Mongle theme you love. Give your familiar diary a little more of your own style.

Explore stickers and themes

The delight of waiting for a letter

Send a letter through the Mongle Mailbox, then look forward to a reply in your friend's own personality and voice.

Replies are written by AI. The mailbox is for ages 14 and up and requires sign-in and stamps.

Discover the mailbox

A little journey through everyday life

Pick a country and begin a 30-day journey through daily journaling. As your entries add up, collect stamps and meet traveling friends.

Discover journeys

03 / A letter from the maker

One person in Korea.One small step at a time.

Write to the maker

Send feature ideas and questions by email.

denru0907@gmail.com

Hello. I'm the developer making Mongle Haru.

What if writing could bring someone a little comfort? That thought was the beginning of Mongle Haru.

I want it to be okay if your day wasn't remarkable, or if you haven't written in a while. Whenever you open the app again, I hope it still feels welcoming.

I'm improving it bit by bit. Tell me about the moments you enjoyed, or anything that felt awkward to use. Your experiences help shape what Mongle Haru becomes next.

With care, the maker of Mongle Haru

Feel at home from the start

Read how we handle personal data and the terms for using the service. If you have a question, you can write to us.

Star Collector Mongle under the night sky beside a glass lantern filled with stars

How was your day?

Nothing special had to happen. Start with your first line today, with Mongle beside you.

App StoreGoogle Play

See you on iOS and Android.