55 apps
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Physics
4.7611 ratings34.1K
Rocket Workshop
Build a rocket, launch it and find out what it takes to reach space.
General
4.6165 ratings52.9K
Geography
Name the country, pin its capital, pick its flag.
Physics
4.6195 ratings35.9K
Scribble Launch
Sketch ramps, seesaws and ropes, and roll the pod into its rocket.
Math
4.583 ratings52.4K
Pipes
Rotate the pipes and bring water to every tile in one connected network.
Math
4.649 ratings33.7K
Hashi
Connect every island into one network without crossing any bridges.
Math
4.610 ratings20.7K
Recursion Explorer
See each term of a sequence built from the one before — in math and in Python.
Math
4.627 ratings13.7K
Proofs without words
See why (a+b)² = a² + 2ab + b² — drag a square apart and let the areas prove it.
Math
4.711 ratings8.1K
Interest Lab
Same deposit, same rate, two outcomes. See where compound interest wins.
Math
56 ratings5.8K
Solids of Revolution
Design an axial section, spin it, and work out V and S.
General
4.453 ratings58K
Smart Encyclopædia
Explorable infographics. Click anything to generate the next one.
Biology
4.81,820 ratings143.6K
Human Body Atlas
Explore, isolate, and take apart thousands of anatomical structures.
Math
4.1575 ratings113.3K
Guess the Equation
Solve the daily equation in six guesses.
Biology
4.8932 ratings90.4K
Cell 3D
Explore generated plant and animal cell models in 3D.
Biology
4.51,108 ratings76.8K
Build a Cell
Build cells with the right organelles.
Physics
4.8430 ratings55.2K
Solar System
Explore the planets, the Moon's phases, and eclipses in one 3D model.
Chemistry
4.6248 ratings43K
Build an Atom
Build isotopes and ions from subatomic particles.
Math
4.5394 ratings41.9K
Sudoku
Complete the daily 6×6 or 9×9 logic grid.
Physics
4.3219 ratings39.1K
Logic Gates
Flip the switches so every lamp matches its goal in as few moves as you can.
Math
4.0237 ratings37.6K
Nonogram
Reveal the daily picture with row and column clues.
Chemistry
4.8303 ratings37.3K
Virtual Lab
Drop metals into water and watch reactions unfold.
Math
3.958 ratings36.2K
Marbleslides
Type an equation, hit launch, watch the marbles slide into the stars.
Math
4.3231 ratings35.4K
Tower of Hanoi
Move all disks to the right peg — never on a smaller one.
Math
4.0127 ratings33.2K
Minesweeper
Classic Minesweeper with optional probability hints.
Math
4.7158 ratings33.1K
15 Puzzle
Slide the numbered tiles back into order, lowest to highest.
Chemistry
4.7125 ratings31K
3D Molecules
Drag to rotate, toggle lone pairs, and read the geometry and bond angle.
Physics
4.5307 ratings30.9K
Optics Puzzle
Drag the mirrors so the laser reflects off them and reaches the glowing target.
Chemistry
4.667 ratings21.4K
pH Mixer
Drip acid or base and watch the pH shift.
Chemistry
4.5170 ratings17.1K
Ice to Steam
One flask of water — freeze it, boil it, and peek inside at the molecules.
Math
4.2186 ratings15.3K
Fraction Helper
See fractions as pies, bars, and a number line.
Physics
4.682 ratings13.3K
Incline Forces
See how gravity, friction, and force interact.
Math
4.835 ratings12.7K
Unit Converter
Convert units across length, mass, time, and more.
Biology
4.380 ratings12.4K
Punnett Square
Cross parents and watch inheritance ratios appear.
Physics
4.749 ratings11.9K
Double Pendulum
Watch chaos emerge from two coupled pendulums.
Math
4.464 ratings10.8K
Unit Circle
Drag an angle and watch sine and cosine move.
Math
4.674 ratings10.6K
3D Geometry
Rotate solids, read volume and surface area, and compare equal-volume shapes.
Math
4.647 ratings10.5K
Graphing
Tune functions and watch the curve change.
Chemistry
4.593 ratings10.1K
Equation Balancer
Balance chemical equations with integer coefficients.
Physics
4.734 ratings9.8K
Waves
Drive a string and watch waves reflect.
Math
4.720 ratings9.3K
Vectors
Draw vectors in the plane and in space, and watch every product work itself out.
Physics
4.825 ratings8.9K
Color Models
Mix light, ink, and hue — watch RGB, CMYK, and HSV make the very same color.
Physics
4.419 ratings8.8K
Magnetic Field
Drag magnets and wires, switch views, and read the field with a compass.
Physics
4.629 ratings7.9K
Bending Light
Aim a laser and watch refraction bend the beam.
Physics
4.743 ratings7.3K
Projectile Motion
Launch a ball and watch gravity shape the arc.
Math
4.819 ratings6.6K
Probability Playground
Flip, roll, spin, drop. Theory vs reality, live.
Physics
4.435 ratings6.3K
Optics Bench
Pick a lens or mirror, drag the object, and watch the rays form the image.
Math
4.516 ratings6.3K
Function Analysis
Type any function and explore f, f′, f″ and its integral side by side.
Physics
4.829 ratings6.1K
Pendulum Lab
Swing a pendulum and watch energy trade places.
Math
4.515 ratings6K
Derivative Explorer
Drag along a curve and watch the tangent slope.
Math
4.445 ratings6K
Plane Geometry
Explore 2D shapes with live formulas.
Math
4.541 ratings5.8K
Geometry Theorems
Explore classic theorems with draggable proofs.
Math
3.621 ratings5.6K
Pathfinding
Compare BFS, DFS, Dijkstra, and A* on a grid maze.
Physics
4.715 ratings5.5K
Doppler Effect
Move a source past a listener and watch the wavefronts compress and stretch.
Physics
4.533 ratings5.5K
Diffraction & Interference
Set slit count, wavelength and spacing, then read the maxima off the screen.
Math
4.317 ratings5.4K
Conic Sections
Tilt the plane and watch the conic shape change.
Math
4.325 ratings5.4K
Sorting Visualizer
Watch six classic sorting algorithms race side by side.