External Tracking Methods. In addition to using the app's built-in tracking tools, you can also use external methods to monitor your referrals, such as creating custom tracking links using URL shorteners or using analytics tools to measuryonogamese traffic & conversions from your referral links. Analyzing Referral Data. By analyzing data such as click-through rates, conversion rates, & user behavior, you can gain valuable insights into which referral channels are most effective & where you should focus your efforts. While refer earn apps can be a great way to earn extra income, there are some common pitfalls and mistakes that users should be aware of in order to maximize their success with referral marketing: 1.