On your iPhone, you might not have enabled push notifications.
- Remove Notezilla app from recent app list
- Please go to iPhone settings, select Notezilla app and make sure all the notifications are enabled
- Launch Notezilla app so that you start getting sync notifications when anything changes on the desktop.
Modify something on your Windows PC and keep the sync window open. You will see it syncing within few seconds. Same behavior on phone also.
You can watch this short video for more clarity:
However, push notifications should be enabled like explained above.