The average conversion rate on AppStore is ~15%, with steady yet not growing impressions since launch.
I get about 6 to 15 downloads a day and... 0 paid users. People download the app, use the keyboard for 2-3 times (I have internal server metrics for abuse detection) and then nothing...
My idea with onboarding was simple - I didnt want to show a paywall. I instead wanted to give the user a day of free usage and then let them decide if they want the app or not. I guess the strategy is completely wrong, since it doesnt bring ANY paid users. Even though I find the app useful, and I do use it every day (I live abroad and correcting grammar mistakes inside the messaging app seems valid and easy for me)
Ive added a screen recording of onboarding.. maybe you could give some advice?