Its a simple Tasbee Counter which will help you keep track of your tasbee count. Big buttons and vibrate helps in updating the counter without looking at screen. Also It remembers where you stoped last time even if you close the app. Also check out the Tasbee Pro App

In Islam, Duaa (دعاء) which literally means "invocation" is an act of supplication.

The Most Comprehensive Application for all Muslims