How can I screen record iPhone and Android screen at the same time visible right next to each other? I need to create an app video that need to show interaction b/w a iPhone and a Android phone (Galaxy).

I could use quicktime to screen record single iPhone screen.

How can I screen record iPhone and Android screen at the same time?

The two screens should be visible right next to each other showing everything that is happening on the respective screens.
Does this help? Maybe you can use QuickTime for the iPhone and the options on this link for the Android. Then export the Android video.

http://www.hongkiat.com/blog/android-screen-recording-apps/