Small tools, games, and experiments I made
A Baekjoon-style judge in your browser
389 visitors last week
AI picks and summarizes news on your topic
242 visitors last week
Specimen of this site's typeface
119 visitors last week
Live quota across my AI coding accounts
61 visitors last week
How many tokens did I use?
51 visitors last week
arXiv papers with margin notes, figure guides, and a critical review
43 visitors last week
How much compute am I using?
40 visitors last week
Sleep, readiness, and steps, by day
12 visitors last week
Pass one phone. Find the liar
Is the name taken? Plus an honest AI score
10 visitors last week
What I'm listening to
Spin a toy revolver until one name is left
9 visitors last week
Who visits, from where, and how fast it loads
8 visitors last week
Spin the bottle
3 visitors last week
Curated reading paths
2 visitors last week
Play Sunghyun, AI, or a friend
Flip a 3D coin
Sunghyun's Apple Wallet business card
March your flag past an army of hidden ranks
Climb from Greater Peon to Greater Dalmuti
Standard Korean into regional dialects
1 visitor last week
Get interviewed by a live voice agent
Roll 3D dice
Mafia on your phones, hosted by an AI
Think out loud with a duck that asks questions
Blackjack with friends, AI optional