If you are looking for a strategy to improve and scale your retargeting efforts, you will likely need to use the Facebook Ads Manager itself to gain full access to every tool available to you for retargeting. 

2. Managing your own Facebook advertising 

Managing your own retargeting ads without a third-party app is available to any business through Facebook Ads Manager. By creating a Business Manager page and installing the Facebook pixel, you can set up, launch, and scale your own retargeting ads. 

Pros 

Ads Manager gives you access to every retargeting tool available to you on Facebook. This allows you to test as many different audiences and ad creative types as you want and analyze the full results of all your campaigns.