App Inventor Creation tool

With this simple and intuitive tool you can know what numbers you need to get a specific color in your application, not only for buttons, even for background or else.

When you get your preferred color, you can try to control the alfa factor in order to see what type of transparency you want to achieve.

Many Activityes Starter to develop your applications and also a web inspector to show everything about links you want to insert into your apps.

And don't worry about the dimensions of the text to put into the buttons, because there is a Button Controller that help you to know the minimum size you'll have to give to the buttons into your app!