Alarmmanager fire on every time in android

Like @mighter said, API >= 19 if you must use exact timing, use the setExact() API.

if(android.os.Build.VERSION.SDK_INT < 19) {
    alarmManager.setRepeating(AlarmManager.RTC, utcMillisNextMin(), 60000, createClockTickIntent(_context));
} else {
    alarmManager.setExact(...);
}