iphonenotificationsvibrate
There is an app I can't locate that is constantly making my phone vibrate. When it does, I immediately check the Notification Center. Nothing new there.
The vibrate could be a setting for an email application, or some other app.
One thing to note, I always have my app on silent/vibrate. I just unmuted it in the hopes that the sound will help me figure out what is going on.
Question
How can I determine which app is sending rogue vibrations without any notification?
Yes, you can, you just have to do some digging around to find the particular one that is causing the noise. If you go into your Settings application on your iDevice, and go into the Notifications Options Tab and look for apps that have the sounds attribute available. As seen the in the screen shot below highlighted in red.
Selecting that one will take you further into the customizations and see if the app is sending other notifications, as shown below, this one does sound and badge and can be seen in the lock screen. Toggling those on and off will help you find the culprit.
You will be looking for an App that is only making noise, look for one that says noise only and everything else is turned off, that one will most likely be the problem. You can then turn on other notifications so that it will be more helpful. If you find more than one app that is noise only, enable more notification types to help you narrow down which one it is. Once you find it, you can disable it or change the setting any which way you want.
I hope that this answer helps you narrow down the noisy notifier.
It turns out that there is one app that does not have a "Sounds" setting, but still produces sounds and vibrations: Calendar. It's easy to overlook the all-important setting "Calendar Alerts." Tap that, tap vibrate, scroll all the way to the bottom, and set vibration to "None." That should solve it.
Here's your problem right here:
Just turn vibration off:
That's right!
Best Answer
You may need to go through Settings → Notifications and check which apps have an Alert Style of None and Show in Notification Center disabled, but Sound toggled on.