Tashkil Keyboard is an Android application developed by Bariklana Smart App that offers a user-friendly interface to type Arabic with harokat (vowel diacritics). The app comes with voice-to-text functionality, which converts the user's voice into Arabic writing. Additionally, it offers extra features with arabicpost and a converter from Latin to Arabic.

To use the app, the user needs to click on the "set enable keyboard" option, which takes them to the keyboard settings. From there, they need to check/enable Arabic Harokat default and US default. Arabic 2nd. Next, they need to click on the "change keyboard harokat" option, which displays the keyboard menu. Here, they can select one Harokat keyboard, either Arabic Harokat default or US default.Arabic 2nd. The former displays the main screen in Arabic, while the latter displays it in Latin.

Overall, Tashkil Keyboard is a useful app for anyone looking to type Arabic with harokat and want a simple and easy-to-use interface. However, it should be noted that some cellphones, such as Samsung, do not allow the app to be used for entering a pin or password due to the default keyboard being used for such purposes.