There are a few things to try here.
iOS USERS
Check you are not in “Do Not Disturb” mode
Make sure Notifications are turned on in your phone settings
Make sure Notifications are turned on in the Genesis App
ANDROID USERS
Check version of Android – if less than 4.0.4 you may need to update
Check notifications are enabled in your settings – ensure the “Show notifications” tick-box is selected.
Check you are not in “Do Not Disturb” mode