A free program for Android, by Desh Keyboards.

Arabic Keyboard is the perfect app for anyone who wants to type in Arabic. It allows you to use your device’s keyboard to write in the language of your choice. This tool is perfect for people who are learning Arabic and for those who want to write in their own language.

If you want to start typing right away, simply download and install the application.

You can select your preferred keyboard from the main window. You can customize the settings, as you want. You can select the theme and the background. 

After that, you can start typing in Arabic.

The keyboard is not only a tool for typing in Arabic. You can use it to chat with your friends and family.