build a software

i call this software retargetr.. this software is a mobile retargeting app. When user logs in, user can enter the url of a website and the software automatically brings the emails and phone numbers of everyone on that has visited that url and user can send bulk sms and bulk email to them. OR when user logs in, a code is being generated for user to install on user's website. after user install on his site, retargetr gets the emails and phone numbers of every person that visits that site and then user can retarget them using bulk email and bulk sms. Another option: If user run facebook ad with pixel..now when user login to retargetr..user enter facebook pixel code and then click on submit..retargetr automatically pulls the email and phone number of that pixel and then user can send bulk sms and bulk email to retarget them.