With ConvertKit, it is easy to add this functionality. Just make sure you enable ‘ck_subscriber_id’ in your settings.
![](https://larryludwig.com/wp-content/uploads/2021/03/Screen-Shot-2021-03-31-at-4.31.57-PM.png.webp)
ConvertKit’s API is very limited and does not have built-in integration with Woopra.
However, LinkClicky does offer functionality with Woopra.
It can at least track and merge multiple devices. Limitations with their API only allow for subscription and unsubscription tracking.