"ضياء الصالحين" is a free Islamic application developed by Grand Developers Apps for Android users. It is an all-in-one app that provides a wide range of features for Muslims, including the Quran, prayer times, tasbeeh, rakat counter, and daily tasks.

With its user-friendly interface, the app allows users to easily navigate through its various features. The Quran section offers the full text of the Holy Quran with audio recitation, translation, and transliteration. The prayer times section provides accurate prayer timings for any location in the world, along with the option to set reminders for prayer times. The tasbeeh section allows users to keep track of their daily zikr, while the rakat counter keeps track of the number of rakats performed during prayer.

In addition, the app offers a daily task feature that provides a list of recommended tasks for Muslims to perform on a daily basis. Overall, "ضياء الصالحين" is a comprehensive app that caters to the needs of Muslims worldwide.