Vibration Doesn't Work

Vibration doesn't seem to be a big deal for many, but I require the use of it since I can only hear out of one ear, and even then I require a hearing aid. Don't get me wrong, this is the loudest alarm app I've ever used. My deaf side of my body is sprained, I can no longer sleep on that side. I've been in and out of the app system settings playing with the settings, I just can't seem to get it to work. 
A little help, please?

Hi Dallas,

We apologize for the inconvenience caused and I'll certainly point you to the right direction for further assistance.

https://support.avg.com/support_contact_form?l=en&retUrl=support_Android_Alarm_Clock_Xtreme

Once you submit your request, our AVG mobile team will contact you via email.

Thanks in advance.