Phew! This is the list to end all lists if I do say so myself! After the hours and hours and then a few more hours put into getting this list together, I feel confident in that statement. Two of the biggest requests we get from our readers are preschool apps and apps without in-app purchases. This mega Top 100 List contains the most popular posts we have written since the start of Smart Apps for Kids back in 2011. I dug through thousands of posts and found the Top 100 Completely FREE Preschool Apps (no in-app purchases).