Video Physics is an application for iOS, supporting compatible iPad, iPhone and iPod touch devices. If you have already purchased the app on one device, you can download the app to other devices on the App Store using the same Apple ID.

Note: Some users have reported that the App Store indicates a “Buy” action from the iPhone, rather than the expected “download” option. Users with a previous purchase on the same Apple ID have not been charged, despite the misleading on-screen message. To be sure that you won’t be charged, check in advance that you are using the same Apple ID as your previous purchase:
http://support.apple.com/kb/ht4895

Report billing issues to Apple at:
https://reportaproblem.apple.com/‎;