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Bopomofo Practice
Trace all 37 Bopomofo (Zhuyin) symbols (ㄅ ㄆ ㄇ…) in Taiwan's official MOE stroke order, with animation, live grading, and audio — for learners of Chinese.
Chengyu Guess
A daily four-character Chinese idiom guessing game with a multi-layer hint system. Six tries to crack the hidden idiom.
Chord Finder
Interactive chord diagrams for guitar, ukulele, and piano: look up any chord's fingering, or tap the fretboard to name what you're playing. With alternate voicings.
Scale Sense
Translate any big number into real-world equivalents — 245 hand-picked anchors, from the speed of light to a bubble-tea cup, so abstract magnitudes feel real.
Stroke Order Practice
Trace common Chinese characters in Taiwan-standard stroke order — every character verified against CNS11643 official data, with live grading and stroke animations.
Sundial Simulator
An interactive sundial for understanding solar geometry — adjust latitude and date to watch shadows move.