Publishing your app in to the App Inventor Gallery is absolutely free

You need an icon for your app before you save it to your computer.

If you want to install an app on your device, you need to export an .aia file.

You need wait for approval before your app is uploaded to the App Inventor Gallery.

If you import a project, you can read the blocks but you can't change them.

Your friend's problem are good source of app.

The plan needs to be complete first before you create an app.

It's better to start designing your wireframes on a computer.

You have to pay Php 2500 to upload your app to Google Play stire.

This section in Google Play Store is where you can upload your .apk file.

This section in Google Play Store asks if your app is paid, free, or run by adds.

This is set to 1 by default since this is your first time you will be uploading the app.

This process is when your going to design how each screen will look like and how the user will progress from one screen to another.

This extension lets you save an Android package to your computer and works the same way as an .aia file.