One of the charms and strengths of the iPhone is that you can understand how to use it without reading the manual. However, even if you think you know it, there must be something you don't understand correctly. In this corner, we will explain in an easy-to-understand manner "why the iPhone can't be asked now". This time, we will answer the question, "I heard a notification sound, but I don't know which app it came from!?"
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I picked up my iPhone because I heard a notification sound, but nothing is displayed in the notification center....No banners appear on the home screen, and nothing that looks like it in the notification center. However, since it occurs repeatedly, does that mean that you are concerned about the cause?
Since the cause is presumed to be in the notification settings, open the screen in the order of "Settings" → "Notifications" and open the screen of the app whose settings may have been changed. Among them, even though it is set to receive notifications from the app ("Allow notifications" switch is ON), none of "Show on lock screen", "Show in history", or "Show as banner" If something is turned off, it's probably caused by that app.
The application management side will send notifications if the "allow notifications" switch is turned on. However, if the notification does not appear on the lock screen or banner, and does not appear in the history, it is difficult to find out which app received the notification. Even if the badge switch is on, you won't be able to identify it if you don't remember how many badges you had before the notification arrived. In the case of your question, I was able to know the arrival of the notification by sound or vibration because I had set the notification sound to sound (the "sound" switch was ON), but if this switch was also turned OFF, there would be no notification. I should have never noticed.
In addition, if you notice such a "sound but invisible" type of notification, you may be able to identify the app that caused the notification sound. ] is limited to apps that allow you to select the notification sound. Most apps can only turn on/off the notification sound, so you will have to check the "Notification" setting screen one by one to find the cause.
