I think the complaint is that you only get told that you require a paid plan AFTER signing up. At least on a brief look on the Play Store page and your website, it does not immediately mention it prominently.
That seems like a very dark pattern and is, honestly, pretty scummy.
It doesn't seem like - it is
Which makes it par for the course in the scam that is mobile development
This is not a dark pattern, it's just a constraint that the app stores place on the pricing disclosure that is very non-intuitive. You have to mark your app as "free" to download if you charge a recurring subscription fee. You can only mark it as paid if there is a one time fee to download the app.
Our FAQ and pricing pages all list that it is a paid only app. All of our ads explain that it's subscription based. Anyone who asks we're very transparent about it. If there's somewhere else where you think we can list it to make it more clear I'm happy to add it, just not sure where that would be.