Why prayer times change
Prayer times are not fixed clock values; they are intervals determined by the position of the sun. They shift with location, date and season. When you travel, refreshing the city or current location in your app is the essential first step.
Check your phone settings
Keep automatic date, time and time zone enabled. Precise location generally produces better local results than approximate location. It is also useful to compare the selected calculation method with the method followed by your local mosque or religious authority.
Fit reminders into your routine
You do not need the same alert for every prayer. A longer reminder before Fajr and shorter notices during the day may work better. If alerts fail, review battery optimization, notification permission and background activity settings.