Open app from other app

Hello,
I have created 5 apps in my android device, but now I have to connect them with buttons, at the begining that was not the idea, but I trying to find a way to put some buttons that may be doing this, app1 launch/open app2 then app2 can go back to app1 or go to any other app, etc, etc. I really need the help here, it would be tooooo much work to make a new project… Thankss

If you can’t find anything else: Unity Asset Store - The Best Assets for Game Making

5 bucks is probably cheaper than the time you’ll spend trying to fix it yourself xD

There is also a good answer here: http://forum.unity3d.com/threads/android-ios-launch-from-within-a-unity-app-another-unity-app.222709/#post-1486300

under “You can use something like this on Android:”