I love this app! It's brand new to me as of today but it is fantastic! Brilliant idea. It is scienticaly proven writing things down helps you remember folks!
Anyway, it could be that I am new but I cannot find your pricing anywhere & had to Google it. I suggest making it more clear for customers.
I really think on your end you'll make more money on people opting for premium.
(NOTE these are NOT actual prices here, I am guessing.) But I know if I see that the PDF tool costs $5 but a year of premium is only $15. I am much more likely to just get the Premium which is a much better value for us as customers.

Plus you Mr. CEO (sorry I don't know your name!) cash in on memberships which may not be a ton of money in your pocket at first but eventually leads to auto-renewal signups, people forgetting they're paying so they keep getting charged every year (sorry folks but pay attention to your bills!), more ad space to sell etc. Just a thought!