Engage in learning science and math with the award-winning PhET simulations! Whether understanding atoms, exploring energy, or mastering multiplication, there is a sim for every learner. Perfect for at home, in class, or on the road, this app delivers all PhET HTML5 sims (over 45 sims) in one easy-to-use package.

Developed by experts at the University of Colorado Boulder, PhET sims are used by millions of students every year. The PhET Android app delivers these exclusive features:
• Offline play: learn on the bus or at the park without a WiFi connection.
• Favorites: pick your favorite sims and create your own custom collection.
• Easy sorting: find the right sims for you.
• Fullscreen: maximize your screen real estate for optimal sim exploration.
• Automatic updates: get the latest HTML5 sims as soon as they are released.

PARENTS: Find out how much your child loves the learning experience through the lens of discovery.
TEACHERS: Have your favorite HTML5 sims at your fingertips, even without internet access.
ADMINISTRATORS: The PhET app is optimized for school use, so your teachers will be seamlessly up to date.
STUDENTS: Tell your parents and teachers there's an app that makes learning about science and math more exciting - and it's only 99 cents!

Note: The app does not include PhET's Java or Flash sims. In addition, although we are currently working on improving the accessibility of our sims, most of the sims included in this app do not include keyboard navigation or screen reader access. As accessible sims become available, they will be updated within the app.

Proceeds from the app support the development of more HTML5 sims. On behalf of the PhET team and the students whose lives you have helped improve — Thank you!

// Option A //

To download PhET mod from HappyMod.com.
You need enable the option "Unknown Sources".
1. Click on the above link to download PhET mod APK.
2. Save the file in your device Downloads folder.
3. Now tap on Install and wait for the installation to finish.
4. Once it is done, open the game and start playing it right away.

// Option B //

To download PhET from HappyMod APP, you can follow this:
1. Open your browser and download the HappyMod APK file from HappyMod.com - the only official website of HappyMod.
2. Open Android Settings and go into Privacy or Security.
3. Tap the option to Allow Unknown Sources and enable it.
4. Go to your Android downloads and tap the APK file.
5. Follow the directions on the screen to install it.
6. Search PhET in HappyMod App.