Kenapa Tahlilan is an Android application developed by Az Zikr Studio. It is a book category app under the Education and Reference subcategory. The app provides information about Tahlil, a ritual conducted by some Muslims, mainly in Indonesia and possibly in Malaysia, to commemorate and pray for the deceased. The ritual is usually performed on the first day of death until the seventh day and then on the 40th, 100th, first, second, third, and so on. Some also perform Tahlilan on the 1000th day. The word "Tahlil" itself means to remember Allah by reciting the phrase "Laa ilaaha illallah" (there is no god but Allah).

The app explains the history and significance of the Tahlilan ritual. It provides insight into how the ritual is not mandatory but is a free choice for individuals and families who wish to pray for their deceased loved ones. The app also clarifies that Tahlilan is not a burden on the host and can be performed alone or in groups, in one place or anywhere. Overall, Kenapa Tahlilan provides a comprehensive understanding of this ritual, its purpose, and its significance in the Muslim community.