HARU · 하루글
Not just a diary — a friend who lives your days with you.
Haru is a threaded diary with Siwoo (時友), the friend of your hours — who reads your entries, really looks at your photos, writes you letters first, and helps you tend habits and map the life you're heading toward. Local-first: your diary lives on your device before anywhere else.
SIWOO (時友)
The first diary that writes back first.
Siwoo writes first
A few days of reading along, then letters start arriving — a daily postcard, a weekly letter, a wax-sealed monthly one. Like an exchange diary with a friend who never forgets.
Siwoo sees your photos
The photos you attach aren't decoration. Siwoo actually looks at them — the light, the season, the expression — and weaves that scene into the letter, like a friend who was there.
Draft help on empty days
Nothing coming? Siwoo can sketch a diary draft from your day's traces — you edit, it stays your voice.
An actual letter card from the app — Siwoo quoting the line that stayed.
CAPTURE
Days flow in as a thread — photos, videos, moments.
A threaded feed
Short and often — today's moments stack into a thread, not a blank page demanding an essay.
Live Photos, alive
Attach photos and videos — Live Photos play right in the diary, extract on Android, and can even be created in-app.
Gallery, two ways
Every photo you've kept, browsable as a grid or laid over the calendar of your days.
Quick capture
One tap from your home screen to today's entry — the moment doesn't wait, so neither does the app.
MOOD GRAIN
Feelings become color as you type.
The mood thermometer reads the feeling in your sentences and tints the page — copper for warm days, moonlit indigo for low ones. No sliders, no emoji picker: your words are enough.
Mood thermometer
CalmWarmth turns copper, heaviness turns indigo — the page reads your sentence and blushes.
REFLECT & GROW
Beyond recording — toward the life you're tending.
Heatmap · streaks · stats
Your days settle into a mood-colored grid; streaks and stats show the shape of a season at a glance.
Little ceremonies
Milestones get celebrated — a hundred entries, a long streak. Keeping a diary should feel like winning.
Habit garden
Track small daily habits alongside your diary — each kept promise grows the garden a little.
Vision map (Mandalart)
A Mandalart grid for where you're headed — the diary records your days; this maps where they're going.
The grain of your heart · 結
17-day streak
The grain of your days — the actual mood heatmap from the app.
SENTENCE CARDS
Share one line — never the whole diary.
Still, I walked today. That was all — and somehow, it put my heart at ease.
2026. 7. 12. HaruOne line, made into a card.
Share the one line that stayed with you — never the whole diary.
BACKUP & SYNC
A decade of days deserves a safe home.
Export, free forever
Markdown ZIP export and manual backup are free on every tier, always. Your data walks out the door whenever you say so.
Free text sync
Sign in and your entries' text syncs across devices at no cost — a new phone never means a lost diary.
Your own cloud, for life (Full Edition)
The Full Edition adds one-click sync of your entire archive — photos and videos included — to your own cloud (Google Drive, Dropbox, OneDrive, or WebDAV). One purchase, no subscription, yours for life.
PRICING
Hate subscriptions? So does your diary.
Prices may vary by country (taxes and currency). Full details in the app's upgrade screen.
Free
$0
- Threaded diary · photos · mood colors
- Text sync across devices
- Export & manual backup, free forever
Haru Full Edition
$14.99 — once, no subscription
- Every app feature, forever
- Your-own-cloud sync incl. photos (Drive · Dropbox · OneDrive · WebDAV)
- One payment your future self thanks you for
Haru Ieum (subscription)
$2.99/mo · less on yearly
- Zero-setup managed cloud, 2GB with photos
- Siwoo's letters keep coming (managed AI)
- Mood-grain insights
And when a diary line wants to become a novel — Geul, the long-form studio, shares one world with Haru.