İstanbul Namaz Vakitleri 2021 is a free Android application developed by Mert Adsay in the Utilities & Tools category. The app provides accurate prayer times, which are directly sourced from Diyanet, the official institution for religious affairs in Turkey. The app is user-friendly and contains ads that do not negatively impact its use. Users can support the app by clicking on the ads.

One of the app's convenient features is that it automatically opens the prayer times of the city and district you last selected when you open the app, so you don't have to choose your location every time. You can also view the thirty-day prayer times of the city you have chosen by pressing the table icon at the top of the screen. Moreover, you can download the prayer times from the internet whenever you want by pressing the update icon. The app also allows you to view how much time is left before the next prayer by clicking on the prayer times.

Since the data is uploaded monthly, you can use the app without an internet connection for a month after updating it once. Overall, İstanbul Namaz Vakitleri 2021 is an excellent app for those who want to keep track of their prayer times accurately and conveniently.