Sharing the vocabulary list with other users and compete with them !
Thank you for your feature request!
You can already share your vocabulary with friends by exporting your fullk vocabulary or selected words (have a look on how to do it here: https://support.wokabulary.com/article/33-export-words-on-the-iphone-or-ipad)
We will add some more elements highlighting achievements and progress to the next version. If you do have any specific ideas for competitions, feel free to share!
As Wokabulary does not require registration and does not have a user account system, it is very unlikely that we will add features to directly connect with friends.
However, Wokabulary 6 added more detailed statistics, as well as a learning streak concept, and achievements. So, you can now directly compare with your friends who has learned more words, has a longer streak, or completed more learning challenges.