Blog
Introducing WordQuest, a PWA for Learning English Words as a Game
I released WordQuest, a PWA that turns English vocabulary study into a game. It combines multiple-choice quizz...
Added Sound to Life Game
I added a sound feature to Life Game, the browser-based PWA version of Conway’s Game of Life. You can no...
Liquid Falls, Spreads, and Dries — Droppy, a Coffee Ring Physics Simulator
You have probably noticed that dried coffee spills leave a dark ring at the edge rather than a uniform stain. That phenomenon —...
Spend Your E-Money Balance Down to Zero — Pittari Calculator
Ever had an IC card or e-money balance stuck at an awkward amount you can never quite use up? Pittari Calculator...
Tap the Card, Get Your Password — PassCard Generator
Strong passwords are hard to remember. Password managers are great — until you need to log in on someone else’s device. <...
Instant Japanese Era Converter — Keyboard or Voice Input
Japan uses two parallel calendar systems: the Gregorian calendar (2026, 2025 …) and the traditional era-name system (Reiwa 8, H...