How to add up to 20 friends in Locket widget app?

Hello. I'm going through the reviews of Locket widget app.

In the latest update, now you can add up to 20 friends. This limit was increased. A lot of people were asking how many friends you can add. In the previous release, it was maximum 10 friends.

Now you can add up to 20 friends. It doesn't say anywhere how many friends you can add, but that's the new feature where you can add up to 20 friends.