# Wind Tunnel Free

> Mobile wind tunnel simulator for fluid dynamics experimentation. (iPhone/iPad app by Algorizk.)

- Source: https://appshunter.io/ios/app/wind-tunnel-free/id381971296 (this page in markdown: same URL + `.md`)
- Developer: [Algorizk](https://appshunter.io/developer/381971299)
- Category: Education, Entertainment
- Price: Free
- Rating: 4.73/5 from 51 App Store ratings · 53 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 1 MB
- Languages: English
- Released: 2010-07-20
- Data updated: 2026-08-22
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/wind-tunnel-free/id381971296/reviews.md

## What is Wind Tunnel Free?

Turn your iPad/iPhone into a wind tunnel simulator !

Draw obstacles and watch the fluid flow around. Experiment with different sizes, shapes, aerodynamic profiles and see what happens !
Tap the blue button to bring application controls. Three segmented controls let you choose between:

• 4 touch actions:  interact with the fluid, draw walls, insert smoke probe, use eraser tool. 
• 4 visualization modes:  particles, smoke, pressure field, velocity field. 
• 2 simulation modes:  wind tunnel (with adjustable wind speed), free mode (with no constrained wind).


If you are interested in more options, check out Wind Tunnel, the paid version of this app, with many more features!

New in version 1.5.1:
- updated for iOS 9 

New in version 1.5:
- improved retina graphics
- new simulation engine for dual-core devices
- iPhone 5 support
- other graphic improvements

New in version 1.3:
- Much more accurate fluid simulation engine.
- Visualization of velocity field, with this color scheme :  black (fluid at rest), blue, red, yellow (highest speed).
- New preset models (try "swirl" !).
- Ability to change smoke color : in "interact" touch action and "smoke" mode,  double tap on the smoke source, at the top of the screen
- Fixed bugs on boundary conditions.


New in version 1.2:
- Added support for older iphones and ipod touch (armv6)
- Minor bug fixes
- Added models of the "Lite" version


Fluid motion is computed by solving Navier-Stokes equations, at high definition ( 23000 grid cells on ipad ) thanks to a well-optimized code taking the most out of CPU performance.

Thank you all for your great comments.

## Key features

- Draw obstacles
- Fluid flow simulation
- Multiple visualization modes
- Adjustable wind speed
- Interactive touch actions
- Preset models

## Recent user reviews (10 of 53)

All indexed reviews: https://appshunter.io/ios/app/wind-tunnel-free/id381971296/reviews.md

### 4/5 — Great Little App To Show People Wind Around House

*2023-04-17*

I love this app. it would be great to reward developer.

### 4/5 — Updates

*2022-12-05, version 1.51*

I like this a lot but it really needs some updates. Be nice to draw easier or import profiles.

### 5/5 — Paid Version not Available?!?!?!

*2022-09-19, version 1.51*

Would LOVE to get the paid version!!!  Tons of useful features are missing otherwise.

### 5/5 — Great but add the paid features

*2022-09-14, version 1.51*

I cannot purchase the paid version in the US because it says the app isn’t applicable in my region. A coworker was able to get it on their device years ago and it works flawlessly. Can either the paid version be opened up for the US based customers or can you put the paid content into this app as an in app purchase?

### 5/5 — Wind Tunnel CFD unavailable in the USA

*2022-06-12, version 1.51*

How can the “Wind Tunnel CFD” version of this app be made available… in the US?

### 5/5 — Excellent tool for CFI’s/student pilots

*2021-12-18, version 1.51*

I just wish there was a way to change the angle of items drawn or angle on oncoming air. You just have to manually redraw the airfoil.

### 5/5 — Do a few changes.

*2020-08-15, version 1.51*

This is a cool app but unlike the paid version of wind tunnel, there is an option to change the angle of attack of the shape you draw like an airfoil but this free version doesn’t have that please add an option for changing the angle of the drawn shape

### 5/5 — Sooooooo Cool

*2020-08-10, version 1.51*

Great Game! And No Ads😎😎😎🌪🌪🌪🌊🌊🌊⛈⛈⛈🌋🌋🌋

### 5/5 — Amazing app to show concepts in action.

*2019-05-18, version 1.51*

Great app with great UI. Only thing... maybe add a high pressure/ low pressure key

### 5/5 — Awesome

*2018-09-02, version 1.51*

Awesome app, but it will be better if the line is softer, just to have laminar flow, pleeease

## Frequently asked questions about Wind Tunnel Free

### What does Wind Tunnel Free do?

Wind Tunnel Free transforms your iPad or iPhone into a wind tunnel simulator. It allows you to draw obstacles and observe how fluids flow around them, enabling experimentation with different shapes and sizes to understand aerodynamic principles.

### What are the key features of Wind Tunnel Free?

Key features include the ability to draw obstacles, interact with the fluid, insert smoke probes, use an eraser tool, and choose from multiple visualization modes like particles, smoke, pressure field, and velocity field. You can also select between wind tunnel and free simulation modes.

### Is Wind Tunnel Free a paid app?

No, Wind Tunnel Free is a free application. There is a paid version, Wind Tunnel, which offers additional features and options for users who require more advanced simulation capabilities.

### What devices is Wind Tunnel Free compatible with?

The app has been updated for iOS 9 and supports older iPhones and iPod touches (armv6). It also features improved retina graphics, iPhone 5 support, and a new simulation engine for dual-core devices.

### How is the fluid motion calculated in Wind Tunnel Free?

Fluid motion is computed by solving Navier-Stokes equations at high definition. The app utilizes a well-optimized code that leverages CPU performance to achieve this, with a grid cell count of 23,000 on iPad.

## Version history (last 1 release)

### 1.51 — 2015-11-18

This app has been updated by Apple to display the Apple Watch app icon.

-- Updated for iOS 9
News: 
-- Explore the wave nature of light in our new electromagnetic simulation app LightWave Studio!

-- Perform quantitative fluid analysis (Reynolds number, speed and viscosity units) in a refined simulation engine (second order advection, immersed boundary method) in our new Wind Tunnel CFD app developed in partnership with Numeca!

--This original Wind Tunnel app, now five years old, becomes free! More information at www.algorizk.com/windtunnel.

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## More apps by Algorizk

- [Wave Workshop](https://appshunter.io/ios/app/wave-workshop/id1338526983)

All apps by Algorizk: https://appshunter.io/developer/381971299

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-22.*