I think you'll need to offer something significantly better than what is already available for free on other apps to really get traction. This space is already

I think you'll need to offer something significantly better than what is already available for free on other apps to really get traction. This space is already pretty crowded -- https://en.wikipedia.org/wiki/List_of_flashcard_software https://en.wikipedia.org/wiki/List_of_flashcard_software -- but I still think there's plenty of room to improve on what current services offer. Agree with the others that your pricing doesn't make sense. You want to get users to the hook point of SRS. Very few people reach this point [0], and having an arbitrary card limit will only make this worse. I would provide a very generous free trial period that has all the features of the full version -- perhaps something like 60-90 days. If someone is actually still using the app at the end of the trial, they'll be really easy to convert because they see the huge benefits. The reality is, the vast majority of your sign ups will not reach that point, but a bigger proportion will if they don't have the arbitrary card limit that prevents them from seeing the real value of SRS. Best of luck to you! [0] There's a blog post out there from an author of free SRS software that laments how awful the conversion rates were because users just don't stick with SRS, but I can't seem to find it.