Good Day. I am currently searching about popular book apps for my children. Toddlers and preschoolers to be precise. I need some assistance with data like 1) picture book apps ranked as popular ones, 2) popular due to certain aspects like perhaps in terms of price, level of fun, more pictures'-based and etc 3) any kind of data to assist me in proving that popular picture book apps for preschoolers are popular due to various reasons
