Is it okay to use Unity 3D programming and gaming software to create mobile game apps for Android and iOS? I am using a free version of Unity 3D and planning it to sell my current game app I've created by publishing it to Google Play. I also use this method for earning money by setting as a free app with ads on it.
I saw some developers relied on using free version of Unity 3D to create games and published it via App Store or Google Play. If it does, should I have to pay or share contribution to the Unity development team for earnings since I use the free version in order to rely for producing several game apps for business?