Great idea! How did you decide on the pricing?

I launched a Japanese Kanji Learning App (KanjiMaster.ai) last month, and I chose a subscription instead of a one-time payment.

Thanks! I decided on it because I think people are fed up with subscription systems and it was easy to implement. However, I made two sales (yay! first time ever) but I paid $20 today to DeepL. I might change it in the future.