Ability to view a monthly calendar with dates marked green for days with all 5 prayers completed. Incomplete days can be colored yellow, and clicking on a date shows which prayers were missed and need to be completed/qadha. It would be beneficial if the calendar could go back many years to help track qadha prayers from the past. Additionally, the option to mark other sunnah prayers done for the day, such as tahajjud, would be helpful.