kkiruk studio is a one-person indie studio in Seoul. I make and maintain whatever I want to bring into the world: games, apps, stickers, and small tools.
Products I built solo have been downloaded more than 10 million times.
Starting with Cats are Cute, I make and operate games, apps, stickers, and tools. Featured by the App Store, selected as Google Play Editors' Choice, and named MobileSyrup Game of the Week.
Quick Links
Games
I run the Cats are Cute series and the James series across iOS and Android, with more than 10 million downloads in total.
Cats are Cute: Cat Town Idle
An idle collection game about inviting cats and growing a small cat town. Launched in 2018 and still maintained, it has been featured by the App Store, selected as Google Play Editors' Choice, and named MobileSyrup Game of the Week (10/10). 10M+ downloads and 180K+ reviews across iOS and Android.
Cats are Cute: Pop Time!
A Suika-style cat merge puzzle where you drop, merge, and pop cats. It adds four modes, leaderboards, accessories, and background collection to a short-session puzzle loop. 4.9β
on the App Store and 5K+ reviews on Google Play.
James Summer
A casual arcade game about running on water and jumping through waterslides, built around simple controls and quick retries.
James Spring
A spring-themed hide-and-seek runner from the early James series.
Creator Tools
Small apps for researching, saving, and turning raw thoughts into useful material.
Sidefeed
A research app for comparing YouTube trends across countries and categories. It tracks 12 countries, 14 categories, 6-hour ranking changes, Top Movers, and Radar Score to help creators find ideas outside their recommendation feed.
PinClip
A bookmark app for finding saved shorts and reels later. Save from the share sheet, pull in thumbnails, titles, and platform data, then organize clips with folders, tags, memos, and iCloud sync.
Talk Memo
A voice memo app for recording from Apple Watch and organizing text on iPhone. Built for moments when your hands are busy, then sent to Notion, Bear, or Obsidian.
Everyday Utilities
Apps for small recurring decisions: what to wear, what to save, what to monitor.
ThanYesterday
A weather app that tells you whether today is colder or warmer than yesterday. Instead of focusing only on numbers, it helps with clothing decisions through layered outfit tips, departure-time alerts, and home/lock-screen widgets.
SwitchBoard
A macOS menu bar monitor for Claude Code sessions. It helps track local work state and send notifications through macOS, Slack, Discord, and Telegram.
Family & Privacy
Tiny interfaces for trust-sensitive moments.
Honest Camera
A camera app simple enough to hand to a child. It keeps one shutter and removes modes, gallery access, accounts, ads, tracking, and third-party SDKs. Photos save directly to the iPhone photo library.
LINE Stickers
Two sticker series available in 5 languages on LINE STORE.
Mr. Finger Goes to Work β Office-life stickers featuring a finger character.
Korean Β· English Β· Japanese Β· Thai Β· Traditional Chinese
Korean Β· English Β· Japanese Β· Thai Β· Traditional ChineseHappy Purrsday! β Animated cat stickers.
Korean Β· English Β· Japanese Β· Thai Β· Traditional Chinese
Korean Β· English Β· Japanese Β· Thai Β· Traditional Chinese Writing
Blog β Development notes, design decisions, and project retrospectives.
Get in Touch
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General: kkirukstudio.help@gmail.com Business: kkirukstudio@gmail.com 2026 kkiruk studio. All Rights Reserved. Site pages