Shared leaderboard for free and paid version of app?

Hi all!

I currently have a free app that has been available on the app store for about a year now, and I would like to create a paid version of this app which grants all features and unlockables to the user.

The problem I am faced with is that the free version of the app already has around 400 users on the leaderboards, and I would like for the free-to-play users and pay-to-play users to be able to compete with each other over a shared leaderboard.

Would it somehow be possible to link the 2 leaderboards between the 2 apps, or have the 2 apps reference the same leaderboard so that all users may compete with one another?

Thanks in advance!

Shared leaderboard for free and paid version of app?
 
 
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