To set custom notification title and icon,

Open Calculator Pro+>> GO to settings >> Notification

1. Enable “Private SMS Notification“
2. Enable “Enable Visibility“
3. Custom Title (set some strings)
4. Custom Image (Set any one of image, Note: Make sure you select image base on your background color of notification bar).

If you want to set contact specific notification then,

1. Open application
2. Go to contacts and click on contact to modify
3. Click on “Modify contact“
4. Click on “Custom Notification“
5. Enable(Check) Use custom notification
6. Notification Title (set some strings)
7. Notification Icon (Set any one of image, Note: Make sure you select image base on your background color of notification bar).
8. Go back and click on “SAVE CONTACT” button at bottom of screen.