WAVE PHYSICS SIMULATOR

See the
waves.

From superposition, standing waves, beats and the Doppler effect to interference, diffraction, refraction and thin films — 12 wave simulations you can touch and explore.

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Free12 simulations16 languagesiPhone · iPad · Android

12simulations

16languages

$0no in-app purchases

3categories

Simulations

12 simulations

Three categories: wave basics, sound waves, and waves in a plane & light. Drag and slide to see the waves change instantly.

Wave basics

Superposition

Add two waves and watch them reinforce or cancel

Reflection

Reflection at a fixed or free end

Standing Wave

Harmonics on a string: count the nodes

Fourier

Build square and triangle waves from sines

Sound waves

Beats

Two close pitches make a beat

Doppler

A moving source squeezes the waves ahead

Air ColumnNEW

Resonance in closed and open pipes

Waves in a plane & light

2D Ripples

Tap the water to make ripples

Interference

Fringes from two point sources

Diffraction

Waves bending through a slit

Refraction

Waves bending at a boundary (Snell's law)

Thin FilmNEW

Why soap films and oil slicks shine in color

Screenshots

Touch, observe, understand

Tap the water, drag a sound source or move a slider and the waves respond in real time.

**Why soap bubbles shine in color**Film thickness and thin-film interference

**Reinforce and cancel**Fringes from two point sources

**Waves bend around the gap**Diffraction and Huygens' principle

**Breaking the sound barrier**The Doppler effect and shock waves

**Air vibrating in a pipe**Closed and open pipe resonance

**Add sines, get a square wave**Build waveforms by Fourier synthesis

Features

Built for learning

Hands-on

Tap the water to make ripples, drag the source and observer, and change frequency and amplitude with sliders.

Explanations with formulas

Every screen has a hint on how to try it, plus the physics and formulas behind it.

Easy to read and use

Dark and light themes, large text, landscape and tablets are all supported.

16 languages

English, Japanese, Chinese (Simplified / Traditional), Korean, Spanish, Portuguese, German, French and more.

Pricing & ads

The app is free. There are no in-app purchases, subscriptions or paid unlocks.

A Pangle banner ad is shown at the bottom of the screen. On iOS, the App Tracking Transparency (ATT) prompt appears at launch, and ads are personalized only if you allow tracking. On Android, the app asks once whether ads may be personalized. Either choice can be changed later from "About this app" > "Ad settings".

Requirements: iPhone and iPad with iOS 15.0 or later; Android 7.0 (API 24) or later phones and tablets.

Wave physics in your pocket.