Is it obligatory to pray immediately when the time for prayer appears in adhan programs, or is it better to wait a few minutes, especially when the actual adhan is not heard?

If prayer times applications are based on calendars set by reliable authorities, there is no harm in relying on them, such as the Umm Al-Qura calendar, which scholars have attested to its reliability. It is recommended to delay Fajr prayer by a few minutes to avoid the disagreement of those who believe its time begins earlier in this calendar. If the application is not regulated by an accredited calendar, it can be used for guidance, but one should wait after its notification of the time’s entry until certainty or strong

Dunn is achieved regarding the time’s entry. However, if the applications are not based on a known origin or a reliable calendar, it is not permissible to rely on them, and the entry of the time must be verified with certainty or strong

Dunn.