One suggestion on helping people remember better. The emojis are ambiguous. Like I cannot remember the difference between the 2 book icons. I suggest make them

One suggestion on helping people remember better. The emojis are ambiguous. Like I cannot remember the difference between the 2 book icons. I suggest make them the same with a $ sign on the paid one, Or better $ flying out of a book for a paid ebook. IMHO people learn better with pictures that are vivid, would you remember something better if I attached it to the word "elephant" vs "an elephant with a pink underwear"?