How the Quantum World Works
Like Duolingo, but for How the Quantum World Works. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
For the part of you with thirty open tabs that never became anything.
A short one: 11 levels across 2 sections, about 22 minutes end to end, roughly 4 days at five minutes a day. It moves through The Rules That Break Intuition and Quantum Reality at Work. It starts from scratch.
Free forever · No credit card · iPhone & Android

Key ideas in How the Quantum World Works
- Energy is absorbed or released in fixed, discrete packets called quanta rather than any arbitrary amount
- A system can exist at step 1 or step 2, but never at step 1.5
- Light can form interference patterns just like ripples spreading across water
- Light strikes matter as localized energy bullets called photons that deliver energy all at once
- Electrons are restricted to specific, fixed energy shelves around an atom
- Quantum jumps are instantaneous transitions without any intermediate resting or travel state
- Falling electrons release light with an energy exactly equal to the gap between their shelves
- Every chemical element has a unique arrangement of energy shelves, producing its own signature colors of light
- Unmeasured quantum particles do not travel along a single curved or straight line like a baseball
- A particle travels as a wave of probability spread out across space
- The wave explores all available trajectories simultaneously until a measurement occurs
- Single particles fired individually produce an interference pattern over time
- Each particle travels as a wave through both slits simultaneously
- The particle interferes with its own alternate paths, not with other particles
- A hidden coin already landed on heads or tails; our lack of knowledge is just subjective ignorance
- Superposition means the quantum particle has not chosen a definite state yet
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives How the Quantum World Works the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
Picture walking up to a candy machine that refuses pennies and only takes whole tokens. How does an atom trade energy?
Get it right to open this lesson and 10 more in the app.
Where How the Quantum World Works takes you
Discover the surprising rules of nature at its smallest scale. Learn why particles act like waves, how atoms communicate across space, and how quantum oddities power the device in your hand.
- 1
The Rules That Break Intuition
- Nature Comes in Packets
- Waves, Particles, and the Observer
- 2
Quantum Reality at Work
- Tunneling and Spooky Connections
- Everyday Quantum Technology
2 sections · 4 units · 11 levels. Built to play, not to enroll.
You pick the voice
How the Quantum World Works is taught in the The Storyteller style: every lesson is a story. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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Start How the Quantum World Works today.
Download Tomo, search How the Quantum World Works, and play your first lesson in under a minute.