55 apps
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Physics
4.8496 ratings29.8K
Rocket Workshop
Build a rocket, launch it and find out what it takes to reach space.
General
4.6132 ratings48.1K
Geography
Name the country, pin its capital, pick its flag.
Physics
4.590 ratings34.1K
Scribble Launch
Sketch ramps, seesaws and ropes, and roll the pod into its rocket.
Maths
4.456 ratings49.3K
Pipes
Rotate the pipes and bring water to every tile in one connected network.
Maths
4.630 ratings32.2K
Hashi
Connect every island into one network without crossing any bridges.
Maths
4.68 ratings20K
Recursion Explorer
See each term of a sequence built from the one before — in maths and in Python.
Maths
4.720 ratings13K
Proofs without words
See why (a+b)² = a² + 2ab + b² — pull a square apart and let the areas prove it.
Maths
4.910 ratings7.7K
Interest Lab
Same deposit, same rate, two outcomes. See where compound interest wins.
Maths
54 ratings5.4K
Solids of Revolution
Design an axial section, spin it, and work out V and S.
General
4.447 ratings56.6K
Atlas
Explorable infographics — click anything to generate the next one.
Maths
4.718 ratings8.9K
Vectors
Draw vectors in the plane and in space, and watch every product work itself out.
Biology
4.81,363 ratings1.4L
Human Body Atlas
Explore, isolate and take apart thousands of anatomical structures.
Maths
4.1558 ratings1.1L
Guess the Equation
Solve the daily equation in six guesses.
Biology
4.8758 ratings86.3K
Cell 3D
Explore generated plant and animal cell models in 3D.
Biology
4.5975 ratings74K
Build a Cell
Build cells with the right organelles.
Physics
4.7332 ratings53K
Solar System
Explore the planets, the Moon's phases and eclipses in one 3D model.
Chemistry
4.6215 ratings41.5K
Build an Atom
Build isotopes and ions from subatomic particles.
Maths
4.4341 ratings39.9K
Sudoku
Complete the daily 6×6 or 9×9 logic grid.
Physics
4.2166 ratings37.3K
Logic Gates
Flip the switches so every lamp matches its target in as few moves as you can.
Maths
4.0229 ratings36.4K
Nonogram
Reveal the daily picture with row and column clues.
Chemistry
4.8258 ratings35.8K
Virtual Lab
Drop metals into water and watch reactions unfold.
Maths
4.3226 ratings35.1K
Tower of Hanoi
Move all discs to the right peg — never on a smaller one.
Maths
3.958 ratings34.8K
Marbleslides
Type an equation, hit launch, watch the marbles slide into the stars.
Maths
4.0125 ratings32.1K
Minesweeper
Classic Minesweeper with optional probability hints.
Maths
4.6115 ratings31.2K
15 Puzzle
Slide the numbered tiles back into order, from lowest to highest.
Chemistry
4.7109 ratings30.2K
3D Molecules
Drag to rotate, toggle lone pairs, and read the geometry and bond angle.
Physics
4.5285 ratings30K
Optics Puzzle
Drag the mirrors so the laser reflects off them and reaches the glowing target.
Chemistry
4.661 ratings20.7K
pH Mixer
Drip acid or base and watch the pH shift.
Chemistry
4.5155 ratings16.5K
Ice to Steam
One flask of water — freeze it, boil it, and peek inside at the molecules.
Maths
4.2165 ratings14.6K
Fraction Helper
See fractions as pies, bars, and a number line.
Physics
4.568 ratings12.6K
Incline Forces
See how gravity, friction, and force interact.
Maths
4.834 ratings12.4K
Unit Converter
Convert units across length, mass, time, and more.
Biology
4.373 ratings11.8K
Punnett Square
Cross parents and watch inheritance ratios appear.
Physics
4.747 ratings11.6K
Double Pendulum
Watch chaos emerge from two coupled pendulums.
Maths
4.357 ratings10.4K
Unit Circle
Drag an angle and watch sine and cosine move.
Maths
4.566 ratings10.2K
3D Geometry
Rotate solids, read volume and surface area, and compare equal-volume shapes.
Maths
4.540 ratings9.9K
Graphing
Tune functions and watch the curve change.
Chemistry
4.582 ratings9.6K
Equation Balancer
Balance chemical equations with integer coefficients.
Physics
4.726 ratings9.4K
Waves
Drive a string and watch waves reflect.
Physics
4.722 ratings8.6K
Colour Models
Mix light, ink, and hue — watch RGB, CMYK, and HSV make the very same colour.
Physics
4.417 ratings8.5K
Magnetic Field
Drag magnets and wires, switch views, and read the field with a compass.
Physics
4.525 ratings7.5K
Bending Light
Aim a laser and watch refraction bend the beam.
Physics
4.735 ratings7K
Projectile Motion
Launch a ball and watch gravity shape the arc.
Maths
4.715 ratings6.4K
Probability Playground
Flip, roll, spin, drop. Theory vs reality, live.
Physics
4.330 ratings6.1K
Optics Bench
Pick a lens or mirror, drag the object, and watch the rays form the image.
Maths
4.412 ratings6K
Function Analysis
Type any function and explore f, f′, f″ and its integral side by side.
Physics
4.826 ratings5.9K
Pendulum Lab
Swing a pendulum and watch energy trade places.
Maths
4.514 ratings5.8K
Derivative Explorer
Drag along a curve and watch the tangent slope.
Maths
4.236 ratings5.7K
Plane Geometry
Explore 2D shapes with live formulae.
Maths
4.436 ratings5.7K
Geometry Theorems
Explore classic theorems with draggable proofs.
Maths
3.621 ratings5.4K
Pathfinding
Compare BFS, DFS, Dijkstra, and A* on a grid maze.
Physics
4.614 ratings5.3K
Doppler Effect
Move a source past a listener and watch the wavefronts compress and stretch.
Physics
4.430 ratings5.3K
Diffraction & Interference
Set the slit count, wavelength and spacing, then read the maxima from the screen.
Maths
4.215 ratings5.2K
Conic Sections
Tilt the plane and watch the conic shape change.
Maths
4.324 ratings5.2K
Sorting Visualiser
Watch six classic sorting algorithms race side by side.