kkiruk studio · seoul · since 2016
I make small apps
you'll use every day.
An indie studio of one in Seoul.
From a cat game 10 million people downloaded to a weather app you open every morning —
made and run by one person.
Games
It started with James Spring in 2016 — and grew into Cats are Cute.
Cats are Cute
Cat Town Idle · 10M+ downloads
A healing idle game about collecting cats and growing a tiny town. App Store Featured · Google Play Editors' Choice — 180K+ reviews, ★4.9.
Cats are Cute: Pop Time!
Suika-style cat merge puzzle
Drop, merge, and pop cats. 11 cats to evolve, 4 modes — featured in an App Store Story, ★4.9.
Palette 2048
Art Puzzle · Coming soon
A numberless 2048 played with the colors of a daily masterpiece. Merge by color — and on Saturdays, guess the painting from its palette alone.
Everything I've shipped — App Store ↗ Google Play ↗
Apps
Little tools that make small daily decisions lighter — built one at a time.
ThanYesterday
Weather, compared to yesterday
"3° warmer than yesterday" — one line instead of numbers. Pick today's outfit in 3 seconds.
PinClip
Bookmark Reels & Shorts
Save that passing video with one share, organize into folders, find it again in 3 seconds.
Sidefeed
Trend research for creators
YouTube trending across 12 countries + Radar Score analysis. Find ideas outside your feed.
Talk Memo
Voice on Watch, text on iPhone
Record with one tap on your Watch, read it as text on iPhone. Pay once, use forever — no subscription, no ads.
Honest Camera
My First Camera
A child's first camera with just one shutter. No modes, no ads — nothing to mess up.
Local Link
Travel Map Search · Coming soon
Search with the name you know — it converts to the local script and opens the map app people actually use there.
SwitchBoard
Claude Code monitor · macOS
Every Claude Code session at a glance in the menu bar. Notifications via macOS, Slack, Discord, Telegram.
Artwork
Not apps, not games — things I simply wanted to make.
Stickers & Goods
kkiruk beyond apps — in your chats and on your desk.
Mr. Finger Goes to Work
LINE stickers · 5 languages
Office-life stickers starring a finger character heading to work. Released in 5 languages.
Happy Purrsday!
LINE stickers · animated cats
Animated cat stickers with the same charm as Cats are Cute.
Goods Shop
Cats are Cute official goods
The cats from the game, made real — official character goods.
Hi, I'm kkiruk 👋
Thoughts on an app, new ideas, or something we could build together — drop me a line anytime.