You have created an amazing APP, especially the text-to-speech function! I wonder if you could develop the computer version, so that I can create and review cards by computer directly without uploading through your website or other platforms. With the function, your APP will do better than Anki or Quizlet some day because you have the major functions of text-to-speech and space repetition.
If you want to make your app better, you can add more buttons to the review page. When I review the card, I can choose the familiarity level (e.g., sliding my finger upwards means I am familiar with it, but need to review it later).
Thank you.

Best Regards,
Nancy Lin
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