Hi Dimethy,
That’s strange, I can’t reproduce that issue, everything works perfectly fine for me. I am able to create/delete playlists without problem and the app hasn’t freezed at all. Can you please try to reinstall the app and check if that helps? Thanks.
Are you unable to create LingQs on the app? Are you sure that you are logged into correct account?
You can email us on support(at)lingq.com with your gmail address so that we can check if you are added into Beta testers list and we will provide you Beta app installation link.