Queue and Congestion
Adjust arrivals, service time, and open servers to see why queues grow near capacity.
Explore
Map Projection Lens
Move north from the equator and watch equal ground area expand on a Mercator-like map.
Voting Systems
Change the same electorate and compare plurality, runoff, approval, and ranked-choice winners.
Tokenization Explorer
Split the same text with three clearly named toy token rules and compare the pieces.
Sampling Bias Simulator
Compare random samples with a biased doorway and watch access reshape the result.
Bayes in One Picture
Adjust base and test rates, then see every outcome across one thousand people.
Meeting Cost Meter
Estimate a meeting's time cost upfront or watch the rough total rise while it runs.
Friend Check-In
Shape a low-pressure message for an old friend, close friend, or someone having a hard week.
Difficult Conversation Prep
Turn facts, feelings, hopes, and one request into an editable neutral opening.
Bluff Builder
Build two believable fake answers around a surprising fact, then pass the device and vote.
Mirror Draw
Draw once and watch every line mirror across two or four directions.
Guess the Scale
Choose which object wins each surprising comparison, then reveal the numbers and source.
Sorting Race
Run sorting methods on the same values and see how their work differs.
Probability Playground
Flip from one to one thousand coins and watch observed results settle toward expectation.
Color Contrast
Check a foreground and background pair, then nudge it toward readable contrast.
Text Cleaner
Clean copied text without losing control of spaces, lines, quotes, or bullets.
Date Difference
See calendar days, weekdays, and a plain-language span between any two dates.
Decision Balance
Compare two options across what matters and see what is driving the result.
Two-Minute Reset
A short breathe, notice, and choose sequence for a small pause in the day.
Morning Compass
Turn available time, energy, and one intention into a realistic three-part morning.
Stack It
Drop moving blocks, keep the overlap, and build a clean little tower.
Perfect Pour
Hold to fill the glass, release near the line, and chase a perfect pour.
One-Minute Maze
Find the exit in a fresh compact maze using keys, buttons, or a swipe.
Moon Phase Dial
Turn through a lunar month and connect the Moon's position to the phase we see.
Learning Thai
A small application to help you learn Thai, from the letters to words then sentences and conversations.
Everyday Converter
Cups to millilitres, Fahrenheit to Celsius — the two conversions every recipe seems to need.
Tiny Habits Board
Three weeks of little squares.
How Compounding Works
Drag the years slider and watch a single dollar grow.
Palette Forge
Roll fresh color palettes until one feels right, then click any swatch to copy its hex.
The Bill Splitter
Type the total, who was there, and the tip — it does the awkward math so nobody has to.
Tap the Dot
A tiny reaction game.