Singular is a Facebook Mobile Measurement Partner that allows app publishers to track ad download referrals that come from Facebook.
With Singular, you can track both click-through and view-through performance for your Facebook campaigns. Once a download has been verified by Singular, you can also track subsequent user engagement and monetization of these users in your mobile app.
Singular's Facebook campaign tracking integration also includes Instagram tracking. Once your Facebook tracking integration is set up with the below steps, Instagram conversions will be tracked within Singular as well.