This app is actually a free version of Digital tasbeeh counter PRO.
The first screen of the application is for calculation only. You can enter the calculation text. You can delete an existing counter. You can also create an additional minus button. You can also add a maximum value to the circle. That is, when this maximum value is reached, the green circle is filled. You can make such additions from the Settings section.

The application works in 3 languages: English, Russian and Uzbek.

The third window of the application is the Settings window. In this window, you can make changes to the two windows above.

I recommend getting the PRO version to use the extra features in the app.